You can usually book flights about 11 months (roughly 330–337 days) before departure with most major airlines, though some low-cost carriers only open seats about 6–9 months ahead. For saving money rather than just “booking as early as possible,” many airfare studies suggest booking 1–3 months ahead for domestic trips and about 3–6 months (or more in peak seasons) for international trips to hit the best-price window.

How far in advance airlines let you book

Most carriers work with a fixed “booking window,” beyond which flights simply are not loaded into their systems yet.

  • Many full‑service airlines (American, Delta, United, Alaska, JetBlue, Hawaiian) open schedules about 330–337 days in advance.
  • Several low‑cost or hybrid airlines (Allegiant, Frontier, Southwest, Spirit, Sun Country) tend to show flights only about 5–10 months ahead, sometimes extending the schedule in chunks a few times per year.
  • Travel‑deal and data sites summarise this as: “you can usually book almost a year ahead, but not much more than that.”

Overall, if a date is more than about 11–12 months away, it often will not be bookable yet on regular commercial flights.

Best time to book for cheaper fares

Being able to book early is different from finding the best price.

  • For domestic flights , several analyses and apps suggest tracking prices 3–4 months ahead and actually booking about 1–3 months before departure for a good balance of price and choice.
  • For international flights , guidance is usually to start watching 6–7 months ahead and book around 3–5 (up to 2–8) months before the trip , with extra buffer time for peak holiday seasons.
  • Data from fare trackers shows that booking too early (10–7 months) can mean higher average prices, while a mid‑range “Goldilocks window” (roughly 5.5–1.5 months ahead) often has the lowest average fares and still decent seat choice.

Ticket prices are dynamic, so the most practical rule is to track a route over time and book when you see a price you’re genuinely comfortable with , rather than chasing a perfect theoretical day.

Quick airline window examples (U.S. focused)

Here is an HTML table summarizing common maximum booking windows (how far in advance you can book, not necessarily should), based on recent airline and travel‑site data.

html

<table>
  <thead>
    <tr>
      <th>Airline</th>
      <th>Max advance booking time</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Alaska Airlines</td>
      <td>About 331 days before departure[web:1][web:9]</td>
    </tr>
    <tr>
      <td>American Airlines</td>
      <td>About 331 days before departure[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Delta Air Lines</td>
      <td>About 331 days before departure[web:1]</td>
    </tr>
    <tr>
      <td>United Airlines</td>
      <td>About 330–337 days before departure[web:1][web:9]</td>
    </tr>
    <tr>
      <td>JetBlue</td>
      <td>About 331 days before departure[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Hawaiian Airlines</td>
      <td>About 330 days before departure[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Frontier</td>
      <td>Roughly 5–11 months, often listed as ~330 days[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Spirit</td>
      <td>Around 6–11 months, often ~330 days[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Southwest</td>
      <td>Typically 6–8 (up to ~10) months; schedule released in blocks[web:1][web:9]</td>
    </tr>
    <tr>
      <td>Allegiant</td>
      <td>About 6–9 months, varies by route[web:1][web:9]</td>
    </tr>
  </tbody>
</table>

Practical tips and “real world” nuance

Travel blogs, booking engines, and deal services highlight a few practical points about timing that go beyond just the raw number of days.

  • Peak seasons (major holidays, summer in popular regions, big events) usually justify booking on the earlier side of the typical “best price” window, since demand is strong.
  • Flexible dates and destinations can matter more than exact timing; being open to shifting your departure by a day or two or choosing a nearby airport often saves more than obsessing over a specific booking day.
  • Price‑tracking tools (like Google Flights, KAYAK, Hopper, or subscription alert services) help monitor fare drops automatically and reduce guesswork about when to lock things in.

Bottom line: you can usually book flights roughly 11 months ahead , but for cost savings, it is often smarter to watch fares and book a few months before travel rather than as soon as the schedule opens.

Information gathered from public forums or data available on the internet and portrayed here.