United Airlines flights from STL to IAD
Find comprehensive United Airlines flight information, schedules, and booking details for direct flights from STL to IAD. United Airlines operates 2 flights daily flights on this route.• Flight Duration: 2h 06m - 2h 12m (average flight time)• Distance: 698 miles (1123 km) (air miles between airports)• Daily Flights: 2 flights (scheduled departures per day)
STL
IAD
FLIGHT TIME
2h 06m - 2h 12m
FLIGHT DISTANCE
698 miles (1123 km)
2h 7m - 2h 8m
08:25
13:10
698 miles (1123 km)
January
1 (Show)
14
United Airlines Flight Schedule from STL to IAD
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
UA4506 |  United Airlines | 08:25 | 11:33:00 | Canadair (Bombardier) Regional Jet 550 |
UA4454 | United Airlines | 13:10 | 16:17:00 | Canadair (Bombardier) Regional Jet 550 |
United Airlines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 2h 06m - 2h 12m.
Pricing patterns: January typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 8:00, 13:00, offering more flight options and potentially better connections.
STL - IAD flight price statistics
$435
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$202
Jan$275
Feb$258
Mar$301
Apr$540
May$357
Jun$402
Jul$542
Aug$402
Sep$888
Oct$528
Nov$528
DecUnited Airlines Terminal Information
Terminal information for United Airlines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about United Airlines Flights
How many United Airlines flights operate from STL to IAD?
United Airlines operates 2 flights from STL to IAD.
What city does IAD airport serve?
IAD airport serves Washington.
How long is the United Airlines flight from STL to IAD?
The flight duration is approximately 2h 06m - 2h 12m.
What is the distance from STL to IAD?
The distance is 698 miles (1123 km).
What aircraft does United Airlines use on this route?
United Airlines uses Canadair (Bombardier) Regional Jet 550 on this route.
What are the earliest and latest United Airlines flight departure times?
The earliest United Airlines flight departs at 08:25 and the latest departs at 13:10.
What is the cheapest month to fly United Airlines from STL to IAD?
January is typically the cheapest month to fly United Airlines on this route.
What is the average price for a United Airlines flight from STL to IAD?
The average price for a round-trip United Airlines flight on this route is approximately $435. Prices can vary based on booking time and demand.
How many United Airlines flights operate per week on this route?
United Airlines operates approximately 14 flights per week from STL to IAD.