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 . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

Updated .

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21
Flights a week, 4-week average
2h 9m to 2h 16m
Scheduled flight time
695 mi
Nonstop distance
Free
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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.

Schedule data dated .

Scheduled nonstop departures from St. Louis (STL) to Washington (IAD)
Date Flight Airline Departs STL Arrives IAD Duration Aircraft
UA 4506United Airlines08:3011:462h 16mCR5
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:4011:542h 14mCR5
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:3011:462h 16mCR5
UA 3632United Airlines13:0016:092h 9mEmbraer E175
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:3011:462h 16mCR5
UA 3632United Airlines13:0016:092h 9mEmbraer E175
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:3011:462h 16mCR5
UA 3632United Airlines13:0016:092h 9mEmbraer E175
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:3011:462h 16mCR5
UA 3632United Airlines13:0016:092h 9mEmbraer E175
UA 4454United Airlines13:0916:252h 16mCR5
UA 4506United Airlines08:3011:462h 16mCR5
UA 3632United Airlines13:0016:092h 9mEmbraer E175
UA 4454United Airlines13:0916:252h 16mCR5

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.

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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. 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.

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.

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.

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