Posted on 26/09/26 09:13 am
You've just found a great flight deal or a hotel at the right price. You click through to book, and almost immediately the platform asks you to create an account — and hand over your phone number. It's easy to assume this is purely for booking confirmations, but the reality is considerably broader than that. Travel booking sites collect your phone number at sign-up for a web of reasons that go well beyond sending you a flight reminder.
Flight aggregators, hotel booking sites, and holiday rental marketplaces genuinely do use your number for operational alerts — gate changes, booking confirmations, cancellation notices. That part is legitimate and arguably useful. The problem is that handing over your personal number to accomplish those tasks also gives the platform a persistent identifier they can use long after your trip is over.
Your phone number is not just a contact method. As covered in detail in why your phone number is a bigger privacy risk than your email, it's one of the most reliable ways to track a person across services, devices, and data partners — far more stable than a cookie and far more unique than an email address that someone might change or own several of.
Travel platforms sit at an interesting intersection: they process high-value transactions and attract a disproportionate share of payment fraud and account takeovers. A phone number tied to an account gives them a second factor they can ping during login or at checkout. SMS-based one-time passcodes are their first line of defence against someone using a stolen credit card to book a hotel, or a fraudster testing card numbers across dozens of bookings in quick succession.
This is a reasonable security goal and one of the cleaner justifications for phone-number collection. The catch is that the same number also feeds into everything else the platform does with your data — and that's where things get murkier.
Travel platforms live and die by repeat bookings. The moment you link a phone number to an account, the platform has a channel that's harder to ignore than email and far more difficult to filter. SMS open rates are substantially higher than email open rates — marketing teams at these platforms know this and rely on it heavily.
Your number also becomes the foundation of loyalty programmes. If you've ever wondered why a travel rewards scheme asks for your number during sign-up even before you've booked anything, this is why: the number anchors your identity across every touchpoint. Browsing history, past searches, abandoned booking sessions — all of it gets stitched to that single identifier. This is the same dynamic explored in why loyalty programs want your phone number and how to handle it, and travel reward schemes are no exception.
Most major travel platforms operate within ecosystems rather than in isolation. A booking site might partner with car hire companies, travel insurance providers, airport transfer services, and hotels directly. Your phone number — shared during the initial sign-up or booking flow — can flow to these partners under broad data-sharing clauses buried in a privacy policy most users never read.
This is especially worth considering when you use a travel comparison or aggregator site, because those platforms often pass your contact details to the supplier the moment you click through to complete a booking. You may have intended to share your number with one company, but in practice several parties receive it before your trip even begins.
Travel platforms have historically been attractive targets for data breaches because of the volume of payment data and personal details they hold. When a breach occurs, phone numbers are among the most valuable pieces of data for attackers — they can be used to target victims with smishing (SMS phishing), to assist in SIM swap attacks, or to enrich profiles sold on to data brokers.
The damage from a breach doesn't stop at the platform it happened on. If you've used the same phone number to verify accounts across multiple services — and most people have — a single compromised database can create a chain reaction of exposure. This is one of the core arguments made in why giving every app your real number makes SIM swap fraud easier.
A virtual number lets you pass the SMS verification a travel site requires without handing over the number tied to your real identity, your bank, and every other service in your life. You get the booking confirmation, the OTP, the check-in reminder — everything the platform says it needs your number for — while keeping your personal number completely out of the picture.
This isn't about evading a platform's security measures. It's about proportionate data sharing: giving a service exactly what it needs to function and no more. The travel site gets a valid, verified number for its fraud-prevention workflow. You keep your real number off one more list that could be breached, sold, or used for re-targeting years after your trip is done.
Some platforms require a number they can reach you on for the full length of a booking — from sign-up through to post-stay review requests. SMS Pin Verify offers rentals of up to 25 days, which covers even long-haul multi-destination trips comfortably. You can rent a carrier-registered non-VoIP US or UK number, use it for verification and any booking-related SMS during your trip, and let it go when you're done — with your real number having never entered the equation.
If you're signing up to a comparison site purely to unlock a deal or a price alert — and have no intention of becoming a long-term account holder — a single-use virtual number is even more appropriate. You pay a small per-use fee, receive the OTP, confirm the account, and that's it. No ongoing relationship between your personal number and the platform's marketing database.
The next time a travel platform asks for your number during sign-up, it's worth pausing to ask what they're actually going to do with it. Operational alerts are useful. SMS marketing campaigns and data-sharing with numerous partners are less so. The fact that a platform requires a verified number doesn't mean it has to be your personal number — it just needs to be a real, working one that passes the verification check.
Keeping a virtual number in reserve specifically for travel accounts is one of the simplest privacy habits you can build. It costs very little, requires no technical expertise, and means that if a platform you used once for a city break three years ago gets breached tomorrow, your real number isn't part of the fallout. Head to SMS Pin Verify to pick up a carrier-registered non-VoIP number that'll pass any travel platform's SMS verification in seconds.
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