What is the cheapest month to fly from Dulles to Saint Louis?

Based on current 6-month forward fare data, October 2026 is the cheapest month to fly from Dulles (IAD) to Saint Louis (STL), with fares starting from $97.

What is the lowest current fare from IAD to STL?

The lowest currently-listed fare from Dulles (IAD) to Saint Louis (STL) is $97 on 2026-10-10.

How long is the flight from Dulles to Saint Louis?

Direct flights from IAD to STL cover approximately 1,119 km (695 miles), with an estimated flight time of 1h 19m. Operating airlines: UA.

Cheap flights from Dulles to Saint Louis

Cheapest current fares: $97 in October 2026, 1,119 km direct flight in ~1h 19m.

Last updated August 11, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Dulles (IAD) to Saint Louis (STL). Refreshed daily.

Dulles (IAD) → Saint Louis (STL)

October 2026 $97
August 2026 $261

Frequently asked questions

What is the cheapest month to fly from Dulles to Saint Louis?

Based on current 6-month forward fare data, October 2026 is the cheapest month to fly from Dulles (IAD) to Saint Louis (STL), with fares starting from $97.
What is the lowest current fare from IAD to STL?

The lowest currently-listed fare from Dulles (IAD) to Saint Louis (STL) is $97 on 2026-10-10.
How long is the flight from Dulles to Saint Louis?

Direct flights from IAD to STL cover approximately 1,119 km (695 miles), with an estimated flight time of 1h 19m. Operating airlines: UA.

Related guides for this route

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