--- title: "Boston (BOS) to St. Louis (STL) flights: who flies it" description: "American Airlines flies nonstop from BOS to STL, about 16 flights a week. See confirmed upgrade and award space by date on 2LNR, the next 14 days free." canonical: "https://2lnr.com/routes/bos-stl" url: "https://2lnr.com/routes/bos-stl.md" date_modified: "2026-10-18T05:10:47Z" --- # Boston to St. Louis (BOS-STL): nonstop upgrade & award space American Airlines flies nonstop between Boston (BOS) and St. Louis (STL), roughly 16 times a week. In the timetable below it flies as AA 3546, AA 3562, and AA 4512, scheduled at 3h 11m to 3h 14m for the 1,044 miles. 2LNR checks confirmed upgrade and award space on American Airlines flights on this route, so you can see which departures have space before you book. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 24, 2026. See BOS to STL on the interactive map [Get started free](https://2lnr.com/login) 16 Flights a week, 4-week average 3h 11m to 3h 14m Scheduled flight time 1,044 mi Nonstop distance Free To get started ## Boston to St. Louis flight schedule Scheduled nonstop departures for BOS to STL starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Boston (BOS) to St. Louis (STL) | Date | Flight | Airline | Departs BOS | Arrives STL | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | [Embraer E175](https://2lnr.com/seatmaps/aa/e175.md) | | Fri, Oct 23 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | | Fri, Oct 23 | AA 3562 | American Airlines | 16:15 | 18:26 | 3h 11m | Embraer E175 | | Sat, Oct 24 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Sat, Oct 24 | AA 4512 | American Airlines | 12:21 | 14:35 | 3h 14m | Embraer E175 | | Sat, Oct 24 | AA 3562 | American Airlines | 16:15 | 18:26 | 3h 11m | Embraer E175 | | Sun, Oct 25 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Sun, Oct 25 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | | Mon, Oct 26 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Mon, Oct 26 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | | Tue, Oct 27 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Tue, Oct 27 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | | Wed, Oct 28 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Wed, Oct 28 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | | Thu, Oct 29 | AA 3546 | American Airlines | 07:15 | 09:29 | 3h 14m | Embraer E175 | | Thu, Oct 29 | AA 4512 | American Airlines | 15:25 | 17:39 | 3h 14m | Embraer E175 | Showing all 16 scheduled BOS to STL departures across 7 days with service, starting October 23, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every BOS to STL date on the interactive map ## Aircraft on the Boston to St. Louis nonstop American Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/aa/e175.md) on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## Confirmed upgrade & award space on BOS to STL departures 2LNR tracks confirmed upgrade and award space on American Airlines, segment by segment and date by date. Open the calendar for Boston to St. Louis to see which departures have space, the next 14 days free on every product and the full horizon on Pro. American Airlines award space was open on 8 of the 14 Boston to St. Louis departure dates from October 19 to November 1 that 2LNR checked in the 7 days to October 19, 2026. ### See real availability Confirmed upgrade or award seats by date on the BOS to STL departures 2LNR tracks, checked against live inventory so you know what's open before you book. ### Set an alert Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking. ### Plan on the map See BOS to STL on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Boston to St. Louis nonstop Carriers operating BOS to STL nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date. - [American Airlines (AA) route map](https://2lnr.com/routes/airlines/aa.md)\ [The aircraft AA flies](https://2lnr.com/seatmaps/aa.md) See BOS to STL on the interactive map → ## Frequently asked questions about BOS to STL **How long is the flight from Boston (BOS) to St. Louis (STL)?** Scheduled flight times from Boston (BOS) to St. Louis (STL) run from 3h 11m to 3h 14m across the departures in the schedule table on this page. The nonstop covers about 1,044 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from BOS to STL?** American Airlines is currently the only airline flying BOS to STL nonstop. 2LNR tracks confirmed upgrade and award space on American Airlines. **How many flights a week are there from BOS to STL?** About 16 nonstop flights a week run between Boston (BOS) and St. Louis (STL) in the current schedule, operated by American Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from BOS to STL depart?** Scheduled BOS to STL nonstops in the next 7 days with service leave between 07:15 and 16:15, local time at Boston. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate BOS to STL nonstop?** In the schedule table on this page, BOS to STL nonstops fly as AA 3546, AA 3562, and AA 4512 on American Airlines. The table lists each departure by date with its times and aircraft. **How do I check upgrade or award availability on BOS to STL?** Open the BOS to STL route on the interactive map or the matrix to see confirmed upgrade and award space by date on American Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens. Flying the other way? See [STL to BOS upgrade and award space](https://2lnr.com/routes/stl-bos.md). Award seats rather than schedules? See [American Airlines award availability](https://2lnr.com/awards/aa.md). Looking beyond this route? See [every route from Boston (BOS)](https://2lnr.com/routes/bos.md), or [every route from St. Louis (STL)](https://2lnr.com/routes/stl.md). - [How American upgrades clear](https://2lnr.com/about/aa/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss BOS to STL upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)