--- title: "St. Louis to Washington flights: who flies STL-IAD" description: "United Airlines flies St. Louis (STL) to Washington (IAD) nonstop about 21 times a week, scheduled at 2h 9m to 2h 16m. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/stl-iad" url: "https://2lnr.com/routes/stl-iad.md" date_modified: "2026-10-18T05:10:47Z" --- # St. Louis to Washington (STL-IAD): nonstop flights and who flies them United Airlines flies nonstop between St. Louis (STL) and Washington (IAD), roughly 21 times a week. In the timetable below it flies as UA 3632, UA 4454, and UA 4506, scheduled at 2h 9m to 2h 16m for the 695 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See STL to IAD on the interactive map [Get started free](https://2lnr.com/login) 21 Flights a week, 4-week average 2h 9m to 2h 16m Scheduled flight time 695 mi Nonstop distance Free To get started ## St. Louis to Washington flight schedule Scheduled nonstop departures for STL to IAD 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 St. Louis (STL) to Washington (IAD) | Date | Flight | Airline | Departs STL | Arrives IAD | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Fri, Oct 23 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Sat, Oct 24 | UA 4506 | United Airlines | 08:40 | 11:54 | 2h 14m | CR5 | | Sat, Oct 24 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Sun, Oct 25 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Sun, Oct 25 | UA 3632 | United Airlines | 13:00 | 16:09 | 2h 9m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Sun, Oct 25 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Mon, Oct 26 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Mon, Oct 26 | UA 3632 | United Airlines | 13:00 | 16:09 | 2h 9m | Embraer E175 | | Mon, Oct 26 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Tue, Oct 27 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Tue, Oct 27 | UA 3632 | United Airlines | 13:00 | 16:09 | 2h 9m | Embraer E175 | | Tue, Oct 27 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Wed, Oct 28 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Wed, Oct 28 | UA 3632 | United Airlines | 13:00 | 16:09 | 2h 9m | Embraer E175 | | Wed, Oct 28 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | | Thu, Oct 29 | UA 4506 | United Airlines | 08:30 | 11:46 | 2h 16m | CR5 | | Thu, Oct 29 | UA 3632 | United Airlines | 13:00 | 16:09 | 2h 9m | Embraer E175 | | Thu, Oct 29 | UA 4454 | United Airlines | 13:09 | 16:25 | 2h 16m | CR5 | Showing all 19 scheduled STL to IAD 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 STL to IAD date on the interactive map ## Aircraft on the St. Louis to Washington nonstop United Airlines flies the departures in the schedule table on this page with the Bombardier CRJ and the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## The full STL to IAD nonstop schedule This page carries the full STL to IAD nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each STL to IAD nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See STL to IAD on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying St. Louis to Washington nonstop Carriers operating STL to IAD nonstop in the current schedule. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) See STL to IAD on the interactive map → ## Frequently asked questions about STL to IAD **How long is the flight from St. Louis (STL) to Washington (IAD)?** Scheduled flight times from St. Louis (STL) to Washington (IAD) run from 2h 9m to 2h 16m across the departures in the schedule table on this page. The nonstop covers about 695 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from STL to IAD?** United Airlines is currently the only airline flying STL to IAD nonstop. 2LNR doesn't show award or upgrade space for it on STL to IAD, so this page carries the schedule rather than a space claim. **How many flights a week are there from STL to IAD?** About 21 nonstop flights a week run between St. Louis (STL) and Washington (IAD) in the current schedule, operated by United Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from STL to IAD depart?** Scheduled STL to IAD nonstops in the next 7 days with service leave between 08:30 and 13:09, local time at St. Louis. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate STL to IAD nonstop?** In the schedule table on this page, STL to IAD nonstops fly as UA 3632, UA 4454, and UA 4506 on United Airlines. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on STL to IAD?** Not on this route: 2LNR doesn't show award or upgrade space for United Airlines on STL to IAD. The page carries the full STL to IAD nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [IAD to STL nonstop flights](https://2lnr.com/routes/iad-stl.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from St. Louis (STL)](https://2lnr.com/routes/stl.md), or [every route from Washington (IAD)](https://2lnr.com/routes/iad.md). Nonstops from St. Louis (STL) to other airports within 150 miles of Washington (IAD): - [St. Louis (STL) to Washington (DCA)](https://2lnr.com/routes/stl-dca.md), 23 miles from IAD - [St. Louis (STL) to Philadelphia (PHL)](https://2lnr.com/routes/stl-phl.md), 134 miles from IAD Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full STL to IAD nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)