Loads of travellers show up at the airport with an approved ESTA and no onward documentation, assuming the electronic authorisation is all they need. It's not. A dummy ticket, also called an onward ticket, is a real PNR booked for visa or border-check purposes without paying for the flight. Here are the questions I hear most often before a US trip, and what actually happens when you get the answer wrong.

Do I Actually Need an Onward Ticket for ESTA?

Not legally required, no. ESTA itself doesn't mandate a confirmed booking out of the US. But here's where people get confused: ESTA is authorisation to board a US-bound flight, not guaranteed entry. CBP officers at the port of entry decide whether you're admitted, and they can ask about your departure plans.

If you can't show anything, you're relying entirely on verbal answers. Plenty of travellers get through just fine. But some end up in secondary inspection for hours, or get turned around entirely. The CBP Visa Waiver Programme page is clear that admission is at the officer's discretion.

An onward ticket doesn't guarantee admission either, but it answers the departure question before it becomes a problem.

What Counts as Valid Proof? Can I Use a Screenshot?

This is the most common mistake I see. Screenshots don't hold up.

What CBP and airline check-in agents want is a verifiable Passenger Name Record (PNR). That's a booking that returns live data when the carrier's system is queried. A screenshot of a booking screen, a photo of a confirmation email, or a printout from a fare-comparison site can show anything; they're not independently checkable.

Here's a quick breakdown:

Document Independently Verifiable Works at Check-in Works at CBP
Live PNR from airline or booking service Yes Yes Yes
Real confirmation email with active PNR Only if PNR is still live Usually Usually
Screenshot of a booking screen No Risky Risky
Fare-search results printout No No No

I've heard of travellers getting through secondary at JFK with a screenshot, but I've also heard of people spending four hours being questioned because theirs looked fake. Not worth it.

Does the Airline Check Before I Even Get to CBP?

Yes, and this surprises people. Your airline might ask before you even get your boarding pass.

Carriers on US-bound routes are financially on the hook if they fly someone to the US who then gets denied entry. They have to pay for the return journey. So check-in agents on transatlantic and transpacific US itineraries often ask one-way passengers for onward documentation before issuing a boarding pass. No documentation, no boarding pass.

That's a worse outcome than secondary inspection at CBP: you just miss your flight while still at home.

Our breakdown of airline onward ticket checks at the check-in desk covers what agents are actually looking at and which carriers ask most consistently.

Book a dummy ticket through My Dummy Ticket before online check-in opens, which is typically 24 hours before departure.

What Happens at Pre-Clearance Airports Like Dublin or Toronto?

If you're flying from Dublin (DUB), Shannon (SNN), Toronto Pearson (YYZ), Vancouver (YVR), Calgary (YYC), or Abu Dhabi (AUH), you clear US Customs and Border Protection before you board, not after you land. You arrive in the US as a domestic passenger and skip the US immigration queue.

The inspection is identical to what you'd face at a US arrival hall: same questions, same authority, same discretion to deny entry. The difference is you're doing it in a foreign country before boarding, and pre-clearance officers tend to take a bit more time per passenger than busy arrival halls at JFK or O'Hare.

Travellers report that DUB and YYZ pre-clearance ask about onward travel pretty consistently. If you're flying through either of those, have your documentation ready before you join the queue.

How Long Does a Dummy Ticket Stay Valid?

Long enough to still be active when you travel. That sounds obvious, but the mistake people make is booking well in advance and not checking whether the PNR has expired or been auto-cancelled by the time they travel.

Different services handle this differently. Some PNRs are valid for 72 hours; others stay live for a week or longer. Our guide to dummy ticket validity and how long a booking lasts goes through the timelines in detail.

For a US entry check: book your onward ticket before check-in opens, and confirm the PNR is still live when you reach the airport desk. That's all you need to verify.

What If CBP Asks to Verify My Booking on the Spot?

Stay calm. Hand over the confirmation code and let the officer run the check. A live PNR returns clean results: carrier name, passenger name, departure date, destination. The check takes under a minute.

If the PNR comes back cancelled or empty, that's when things get complicated. You'll likely be sent to secondary for extended questioning, and officers there have more tools and more time. Don't book from a service that auto-cancels after a few hours; that kind of "dummy" booking is useless for a real inspection.

The fix is simple. Real PNR, booked before you travel, kept active until you land. That's the whole recipe.

If you want to skip the guesswork entirely, book a verified dummy ticket through My Dummy Ticket before your flight.

Frequently Asked Questions

Does the onward ticket have to be a flight back to my home country?

No. Any departure from US territory works: a flight to Canada, Mexico, the UK, or anywhere else. CBP doesn't require you to return home specifically. A plausible route out of the US is what matters.

Can I reuse the same dummy ticket for my next ESTA trip?

No. Each US entry is a separate admission event. CBP assesses each visit independently. Book a fresh onward ticket for every trip.

What if I genuinely don't know when I'll leave the US?

That's the whole point of a dummy ticket. Book a plausible date within your 90-day window, use it for documentation, and let your actual plans develop as they will after admission.

Do CBP officers check onward tickets for visa holders as well as ESTA travellers?

Officers can ask about departure plans under any entry category. The question is more common for VWP/ESTA travellers, but having a visa doesn't automatically exclude you from a departure-plan conversation.

What counts as a "plausible" dummy ticket routing?

One that fits the trip you described at the booth. Entering JFK for a two-week New York visit? A flight from JFK to London two weeks later is plausible. A flight from LAX three months later is not. Keep the routing simple and consistent with your stated plans.