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Travel hacks · checked

Which travel hacks actually hold up?

By Gallivanting GadaboutBuilt from official dataSources: official EU, UK, US and Japanese government pages, checked 5 Oct 2026Contains affiliate links
TL;DR

Most travel hacks online cite no source. We checked popular ones for flights, packages, cruises, hotels, car hire, scams and card payments against official government and regulator pages, and gave each a verdict: backed, partly true, contradicted by official sources, or no official evidence. The table lists every claim and links to its answer.

Check the latest before you rely on it. Rates, limits and rules change, and some figures on this page may be out of date. Each amount links to the official page it comes from: check the current figure there before you travel, pay or declare anything. This page is general information, not legal or tax advice, and to the extent the law allows we accept no liability for any loss or problem arising from its use.

Every claim we checked, and its verdict

Travel hacks and their verdicts
ClaimVerdictPage
Book on a particular weekday (often said to be Tuesday) or at a particular time of day to get cheaper faresNo official evidenceFlight hacks, checked
Search in incognito/private mode or clear cookies, because sites raise the fare when you search the same route againNo official evidenceFlight hacks, checked
In the US you can cancel any flight booking for free within twenty-four hours12Partly trueFlight hacks, checked
If a US flight is cancelled or significantly changed, you get your money back automatically - even on a non-refundable ticket234Backed by an official sourceFlight hacks, checked
In the EU or UK, if the airline cancels your flight you can insist on a cash refund instead of a voucher or rebooking5678Backed by an official sourceFlight hacks, checked
If the airline moves your flight earlier or lands you at a different airport, you get the same rights as for a cancellation (EU)6Backed by an official sourceFlight hacks, checked
If a flight is overbooked, volunteer to give up your seat for a payout - and if you are bumped against your will, you are owed compensation589Backed by an official sourceFlight hacks, checked
Hidden-city ticketing / skipping legs: book A-B-C and get off at B, or skip the outbound and just fly the return, with no consequences510Official sources say otherwiseFlight hacks, checked
Two one-way tickets are cheaper than a return (or the reverse: a return is always cheaper than a one-way)511No official evidenceFlight hacks, checked
Split ticketing: booking your connection as separate tickets is cheaper and just as safe as one ticket58Official sources say otherwiseFlight hacks, checked
Drip pricing is illegal: the first price you see for a flight must already include all unavoidable taxes and fees71112131415Backed by an official sourceFlight hacks, checked
Airlines must tell you seat-selection and baggage fees up front, and extras cannot be pre-ticked811121617Partly trueFlight hacks, checked
Once you have paid, the seller cannot put the price up1819Partly trueFlight hacks, checked
If you booked through a travel agent or booking site, the agent - not the airline - has to sort out cancellations and refunds3619Partly trueFlight hacks, checked
Pay by credit card: the card company shares responsibility if the airline or travel company fails to deliver82021Partly trueFlight hacks, checked
Booking your flight and hotel together (in one basket or one deal) turns them into a package holiday with legal protection1922Backed by an official sourcePackage protection
If your package company goes bust, you get your money back or are brought home192223Backed by an official sourcePackage protection
Booking a hotel from the link in your airline confirmation email gives you package protection1922Partly truePackage protection
You can cancel a package holiday for free if the destination becomes unsafe1923Backed by an official sourcePackage protection
Book flight + hotel as a UK package and you are ATOL-protected if the company goes bust; a flight booked direct with the airline is not822Backed by an official sourcePackage protection
EU ferry passenger rights (25-50% compensation for delays, refund or re-routing) also apply to cruises24Official sources say otherwiseCruise hacks, checked
A cruise counts as a package holiday, so package-travel protections apply2225Partly trueCruise hacks, checked
If a cruise from a US port is cancelled, your money is protected by the cruise line's bond26Backed by an official sourceCruise hacks, checked
Cruise "port taxes and fees" must be included in the advertised price11141927Partly trueCruise hacks, checked
Booked a hotel online? You have 14 days to cancel for free under the EU/UK cooling-off rule2829Official sources say otherwiseHotel hacks, checked
Resort fees, cleaning fees and other compulsory extras must be in the first price you see13273031Backed by an official sourceHotel hacks, checked
City or tourist taxes can be left out of the advertised hotel price and added at the end1327Partly trueHotel hacks, checked
Fake or bought hotel reviews are illegal now, and review sites must say how they check reviews3032333435Backed by an official sourceHotel hacks, checked
Hotels are no longer forced to offer their lowest price on the big booking platform, so prices can differ between channels363738Partly trueHotel hacks, checked
Booking apps show cheaper "mobile-only" hotel prices than the same site in a browserNo official evidenceHotel hacks, checked
Changing your country (or using a VPN) gets cheaper hotel and car-hire prices1339Partly trueHotel hacks, checked
Ignore "only 1 room left" countdowns: fake urgency is illegal32Partly trueHotel hacks, checked
A Japanese hotel asking to copy your passport is normal, not a scam4041Backed by an official sourceHotel hacks, checked
Before booking a private rental (minpaku) in Japan, check it shows a notification/licence number4142Backed by an official sourceHotel hacks, checked
You can cancel an online car-hire booking within 14 days for a full refund2939Official sources say otherwiseCar hire hacks, checked
Big car-hire firms in the EU have to be upfront about fuel policies, insurance/waivers and damage charges3943Partly trueCar hire hacks, checked
Photograph or film the hire car before you drive off and get every scratch on the form44Backed by an official sourceCar hire hacks, checked
Check the excess, the deposit, what the CDW leaves out (tyres, glass) and the fuel policy before you book44Backed by an official sourceCar hire hacks, checked
Buy excess cover from an independent insurer instead of at the rental desk44Partly trueCar hire hacks, checked
Tell the hire company if you plan to drive the car into another country39Backed by an official sourceCar hire hacks, checked
Never pay for a holiday rental by wire transfer, gift card, payment app or crypto4546Backed by an official sourceBooking scams
Scroll past the ads when searching for a hotel's website or phone number; fake lookalike sites buy ad slots3245Backed by an official sourceBooking scams
Got a suspicious "booking problem" email? Do not click; forward it to the UK reporting service47Backed by an official sourceBooking scams
Apply for the US ESTA only on the official site; third-party sites charge extra and do not speed things up464849Backed by an official sourceBooking scams
The UK ETA costs £20 on GOV.UK or the official app; other sites charge more and are not faster5051Backed by an official sourceBooking scams
Hotels and shops in Europe cannot add a surcharge for paying by card135253Partly truePaying by card abroad
A hotel or car-hire deposit "hold" on your card must be released as soon as you pay the final bill52Backed by an official sourcePaying by card abroad
Untick pre-ticked extras such as travel insurance; you do not have to pay for add-ons you did not choose13Backed by an official sourcePaying by card abroad
Withdrawing euros from an ATM in another EU country costs the same as at home1352Partly truePaying by card abroad
If your card is cloned while travelling in the EU, your loss is capped52Backed by an official sourcePaying by card abroad

Amounts in this table change. Check the latest: GOV.UK (UK Visas and Immigration), Get an electronic travel authorisation (ETA) to visit the UK GOV.UK (UK Visas and Immigration), Apply for an electronic travel authorisation (ETA)

The answers, by topic

How we checked them

We used only official sources whose terms allow reuse: EU institutions, UK government and regulators, US federal agencies and Japanese government bodies. We did not count airline, hotel, booking-site or blog claims as evidence. Where official sources say nothing about a claim, we say so rather than guess.

What this page cannot tell you

  • Official sources only. A hack with no official evidence may still work sometimes; we cannot say.
  • Rules change. Each answer links its official page.

Related: Travel services · Travel tips.

Key takeaways

  • Each claim links to a short answer with its official source.
  • Where official sources say nothing, we say so.
  • What we would skip: any travel hack that does not say where it comes from.

Sources

Every source behind the claims is listed below and on each topic page. See how we research.

  1. US Code of Federal Regulations, 14 CFR 259.5, Customer service plan (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  2. US Code of Federal Regulations, 14 CFR 259.3, Definitions (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  3. US Code of Federal Regulations, 14 CFR part 260, Refunds for airline fare and ancillary service fees (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  4. US Federal Register, Notice of 7 July 2026 on airline refund rules (document 2026-13675). Read it. Accessed 5 October 2026. US government work, public domain.
  5. European Commission, Your Europe, Air passenger rights. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  6. European Commission, Your Europe, FAQs: Air passenger rights. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  7. UK Department for Transport (GOV.UK), Air passenger travel guide: summary of passenger rights. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  8. UK Department for Transport (GOV.UK), Air passenger travel guide. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  9. US Code of Federal Regulations, 14 CFR part 250, Oversales (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  10. US Government Accountability Office, Report GAO-01-831 on airline ticketing practices (July 2001). Read it. Accessed 5 October 2026. US government work, public domain.
  11. US Code of Federal Regulations, 14 CFR 399.84, Price advertising (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  12. legislation.gov.uk (EU text as adopted), Regulation (EC) No 1008/2008, Article 23. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  13. European Commission, Your Europe, Pricing, payments and price discrimination in the EU. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  14. Competition and Markets Authority (GOV.UK), Providing clear and accurate information about prices: summary (CMA209). Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  15. US Federal Register, Proposed rule of 1 July 2026 on airfare advertising (document 2026-13294). Read it. Accessed 5 October 2026. US government work, public domain.
  16. US Federal Register, Rule of 2 July 2026 restoring the ancillary fee disclosure rules (document 2026-13450). Read it. Accessed 5 October 2026. US government work, public domain.
  17. UK Department for Transport (GOV.UK), Take off for passengers as government scraps extra charges when flying. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  18. US Code of Federal Regulations, 14 CFR 399.88, Prohibition on post-purchase price increase (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  19. European Commission, Your Europe, Package travel, package holidays and linked travel arrangements in the EU. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  20. legislation.gov.uk, Consumer Credit Act 1974, section 75. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  21. US Federal Trade Commission, Using credit cards and disputing charges. Read it. Accessed 5 October 2026. US government work, public domain.
  22. UK Department for Business (GOV.UK), Package Travel and Linked Travel Arrangements Regulations 2018: guidance. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  23. European Commission, Package travel directive. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  24. European Commission, Your Europe, Ship passenger rights. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  25. legislation.gov.uk (EU text as adopted), Directive (EU) 2015/2302, introduction (recitals). Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  26. US Code of Federal Regulations, 46 CFR part 540, Passenger financial responsibility (edition of 1 January 2025). Read it. Accessed 5 October 2026. US government work, public domain.
  27. US Federal Trade Commission, The Rule on Unfair or Deceptive Fees: frequently asked questions. Read it. Accessed 5 October 2026. US government work, public domain.
  28. European Commission, Your Europe, Guarantees and returns. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  29. legislation.gov.uk, Consumer Contracts Regulations 2013, regulation 28. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  30. Competition and Markets Authority (GOV.UK), Unfair commercial practices (CMA207). Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  31. European Commission, Your Europe, Consumer contract information. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  32. European Commission, Your Europe, Unfair commercial practices. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  33. legislation.gov.uk, Digital Markets, Competition and Consumers Act 2024, schedule 20. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  34. US Federal Trade Commission, Consumer reviews and testimonials rule: questions and answers. Read it. Accessed 5 October 2026. US government work, public domain.
  35. US Federal Trade Commission, Press release of August 2024 announcing the final rule on fake reviews. Read it. Accessed 5 October 2026. US government work, public domain.
  36. European Commission (Digital Markets Act), Commission designates Booking as a gatekeeper (13 May 2024). Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  37. European Commission (Digital Markets Act), Factsheet: how the DMA affects businesses using Booking.com. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  38. Competition and Markets Authority (GOV.UK), CMA closes hotel online booking investigation (2015). Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  39. European Commission, Your Europe, Car rental abroad. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  40. Ministry of Health, Labour and Welfare (Japan), Foreign guests at accommodation facilities: passport checks. Read it. Accessed 5 October 2026. 出典：厚生労働省ホームページ（https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000130600_00001.html）
  41. Japan Tourism Agency, 民泊制度ポータルサイト: 民泊を利用する方へ. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  42. Japan Tourism Agency, 民泊制度ポータルサイト: お知らせ. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  43. European Commission, Consumer protection enforcement actions: other travel services. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  44. Competition and Markets Authority (GOV.UK), Hiring a car: what you need to know (2016). Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  45. US Federal Trade Commission, How to avoid a travel scam this summer (consumer alert, June 2026). Read it. Accessed 5 October 2026. US government work, public domain.
  46. US Federal Trade Commission, Avoid scams when you travel. Read it. Accessed 5 October 2026. US government work, public domain.
  47. UK National Cyber Security Centre, Report a scam email. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  48. US Customs and Border Protection, CBP warns against third-party site use for ESTA. Read it. Accessed 5 October 2026. US government work, public domain.
  49. US Customs and Border Protection, Frequently asked questions about the Visa Waiver Program and ESTA. Read it. Accessed 5 October 2026. US government work, public domain.
  50. GOV.UK (UK Visas and Immigration), Get an electronic travel authorisation (ETA) to visit the UK. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  51. GOV.UK (UK Visas and Immigration), Apply for an electronic travel authorisation (ETA). Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
  52. European Commission, Your Europe, Payments, transfers and cheques. Read it. Accessed 5 October 2026. © European Union, licensed under CC BY 4.0; we summarised it.
  53. legislation.gov.uk, Consumer Rights (Payment Surcharges) Regulations 2012, regulation 6A. Read it. Accessed 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.

Method. Verdicts are ours, from what the cited official pages state; see each topic page for its sources.