Is it enough to apply for ESTA the day before departure?

That is risky. CBP recommends applying as early as possible and states that a decision can take up to 72 hours. If you apply later, you risk not having the authorisation by the time you fly.

Can I apply for ESTA before booking my flight?

Yes. CBP even recommends applying as soon as you start planning your trip or before you buy your plane tickets.

How early does it make sense to apply for ESTA?

Since the authorisation is usually valid for two years, applying early is not a problem. CBP does not specify a maximum lead time; what matters is that your travel dates and your passport fall within the validity period.

Does a priority check speed up CBP’s decision?

No. The priority check and the top-priority check only concern the target for our review and submission (non-binding). The decision is made solely by CBP and takes up to 72 hours regardless.

Timeline

When should you apply for ESTA? How long before your trip?

Last checked: 4 October 2026 · Sources: CBP, DHS, Federal Register

“How far in advance do I need to apply for ESTA?” is the most common question before a trip to the United States. The short answer: as early as possible. The long answer is in this guide – including what the authority itself says about it.

What CBP recommends

CBP states that applications can be submitted at any time before travel. It recommends applying as soon as you begin planning your trip or before you buy your plane tickets. So you do not need a fixed trip in order to apply for an authorisation.

According to USAGov, it can take up to 72 hours to find out whether you are allowed to travel under the Visa Waiver Program (source: USAGov). Nobody can promise a decision within minutes; the decision is made solely by the US authority CBP. CBP advises applying at least 72 hours before departure; if you only apply on the day of departure, you risk not having the authorisation in time (source: CBP press release).

A sensible timeline

The following overview is our recommendation. The only benchmark named by the authority is the up to 72 hours for the decision.

When	What to do
When planning your trip	Check your passport (e-passport, validity); apply for ESTA
About 1–2 weeks before at the latest	If not yet approved: check the status, review your details
At least 72 hours before departure	The decision must be available – otherwise you risk being refused boarding
On the day of travel	Have your passport (the same one as in the application) and application number to hand

Since an approved ESTA is usually valid for two years, applying early does no harm – quite the opposite: you have time in reserve if questions arise and can correct mistakes calmly. Only if you are expecting a new passport soon should you wait and apply with the new passport (ESTA and passport).

What can go wrong if you apply late

The status is still “Pending” when you fly. The airline can see the status; without an authorisation it may refuse to carry you (CBP: denied boarding, delayed processing or denied entry).
You have to correct details or apply again and lose time.
The application is denied – then the only remaining option is a visa, and there is usually not enough time for that (ESTA denied).

What “priority” means with private providers

CBP is clear: using a private service does not speed up the authorisation. With us, too, the priority check (target 48 hours) and the top-priority check (target 24 hours, each excluding weekends and public holidays) only describe non-binding targets for our review and submission – not CBP’s decision. If we miss the target, we refund the surcharge. What we do and when is described on the process page; the amounts are listed under prices.

Ready? Then start your application here. Answers to typical questions can be found in the FAQ.

Frequently asked questions

Is it enough to apply for ESTA the day before departure?: That is risky. CBP recommends applying as early as possible and states that a decision can take up to 72 hours. If you apply later, you risk not having the authorisation by the time you fly.
Can I apply for ESTA before booking my flight?: Yes. CBP even recommends applying as soon as you start planning your trip or before you buy your plane tickets.
How early does it make sense to apply for ESTA?: Since the authorisation is usually valid for two years, applying early is not a problem. CBP does not specify a maximum lead time; what matters is that your travel dates and your passport fall within the validity period.
Does a priority check speed up CBP’s decision?: No. The priority check and the top-priority check only concern the target for our review and submission (non-binding). The decision is made solely by CBP and takes up to 72 hours regardless.

You will find more answers in the ESTA FAQ.

Sources and date

Checked on 4 October 2026. The information is based on the following government sources. Rules and fees can change; the current publication by CBP is decisive. This article is general information and not legal or immigration advice.

Next steps

Prepare your application, compare prices or keep reading – the decision is always made by CBP.

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