When Do Airlines Release Flights? The 330-Day Window

When do airlines release flights? Most US carriers open their booking window about 330 days before departure, or a little under eleven months out.

United opens the widest window at 337 days. Southwest is the outlier, loading its schedule in dated batches rather than one new day at a time.

Here is when each major US airline releases flights, why the window sits near 330 days, and what the cadence means for holiday seats and award space, as of August 2026.

How far in advance can you book a flight?

For most US airlines, the answer is about 330 days, or a little under eleven months.

No carrier lets you book more than 365 days out. One reason cited for the cap is simply to stop travelers from booking a flight for the wrong year.

The exact number varies by a handful of days between airlines. As Going puts it, US airlines typically open bookings about 330 days in advance.

The working rule is simple: treat your booking window as roughly eleven months, then check your specific airline for the exact day count.

When does each US airline release flights?

The window is close to 330 days across the board, with a few days of spread at the edges.

Read the table as the airlines and major trackers document it, as of August 2026.

The per-carrier figures line up across The Points Guy, AwardFares, and Delta's own booking terms, which state flight reservations may be made up to 331 days in advance.

Alaska and JetBlue are the two to watch for small discrepancies. Different trackers list Alaska at 330 or 331 days, so treat about 330 as the working number and confirm on the airline's site for a date you cannot miss.

How does a rolling schedule work day to day?

Five of the six carriers above use a rolling calendar, which means the schedule inches forward automatically.

Each day the system drops the oldest past date and adds one new date at the far end. So the furthest bookable day moves forward by one, every day.

That is why a date just out of reach today is usually bookable tomorrow, with no announcement attached to it.

Southwest is the exception to this rhythm, which is why it gets its own section below.

Why is the booking window about 330 days?

The clustering near 330 days comes from how airline reservation systems hold schedule data.

Industry trackers describe those systems as keeping roughly 330 days of forward schedule alongside about a month of past dates. That is why the standard lands close to 330 rather than a full year.

• No carrier opens its calendar beyond 365 days, partly to prevent wrong-year bookings.
• United's 337 days sits about a week past the pack, giving its flyers a small head start.
• Southwest steps outside the daily model entirely and announces dated extensions instead.

So the phrase you will see repeated, an eleven-month window, is really shorthand for a reservation-system limit that most airlines share.

Why is Southwest different?

Southwest does not roll its calendar forward one day at a time.

Instead it opens flights in dated batches and extends the schedule on announced dates, so the far edge of what you can book jumps forward in steps rather than daily.

Because the date moves in chunks, Southwest opens a whole stretch at once, as its latest schedule extension does, reported by Upgraded Points.

The upside of the batch model is a clear finish line. When Southwest opens a new stretch, the whole period becomes bookable at once, rather than trickling out a day at a time.

Check the current far date before you plan a distant Southwest trip, since the next chunk may not be open yet.

Why the release date matters for award seats and holidays

For fixed dates, the day the window opens is often your best shot at the seats you want.

Saver-level award space and premium cabins are frequently loaded the moment the calendar opens, and the best of it can be gone within days, as Thrifty Traveler documents.

That makes holidays the clearest case. Thanksgiving and Christmas dates draw the most demand, so the seats released at open tend to move quickly.

Flexibility helps here too. Shifting a holiday trip by a day in either direction can open seats that the peak date has already lost.

Our guides to when to book Thanksgiving flights and when to book Christmas flights cover the price side of the same trips.

Should you book the moment flights are released?

Booking at open locks your date and seat. It does not lock the best price.

Cash fares usually start high when a schedule first loads, then move as departure gets closer, often reaching their lowest a month or two out on domestic routes. Our explainer on whether flight prices drop closer to the date has the detail.

So the early booking holds your plan, and the fare keeps changing underneath it.

That is the case for booking early and then keeping an eye on the price, especially on the routes where fares tend to soften later, like the ones in our fall fare dip guide.

On cash tickets booked directly with Alaska, American, Delta, JetBlue, or United, you can add your trip to Autopilot after you book, and if the fare drops before you fly, Autopilot reprices the reservation so you keep the difference as airline credit or a refund.

It does not cover award tickets or bookings made through a third party, so booking direct with the airline is what keeps that option open.

Our repricing guide walks through how a fare drop turns into credit after you book.