Cheap flights from St Louis to Washington Dulles Intl (STL - IAD)

Flight FAQs

From St Louis to Washington Dulles Intl

Are flight prices decreasing from St Louis to Washington Dulles Intl due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and Washington Dulles Intl for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from St Louis to Washington Dulles Intl for under $200 on Cheapflights?

Yes, there are multiple flights from St Louis to Washington Dulles Intl for under $200. The cheapest flight booked recently is on Delta for just $156, but on average you can expect to pay $922.

Are there nonstop flights from St Louis to Washington Dulles Intl for under $200 on Cheapflights?

There are no nonstop flights from St Louis to Washington Dulles Intl, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to Washington Dulles Intl for under $400?

There are currently 3+ open flights from St Louis to Washington Dulles Intl within the next 7 days for less than $400.

How popular is this flight route?

The Lambert-St Louis to Washington Dulles Intl flight path was viewed by 23 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What is the cheapest airline for this route?

When searching, try setting your filters to view flights for Trans States Airlines, Inc., as currently they have the cheapest options available from St Louis to Washington Dulles Intl. On average you can find 74 flights for this flight path daily.

Does it rain more in St Louis or Washington Dulles Intl?

When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in St Louis is roughly less than Washington Dulles Intl. You can assume this to be the case over the next 14 days.

Is St Louis weather warmer or cooler than Washington Dulles Intl?

Expect the weather to be around 90 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Washington Dulles Intl is generally colder than in St Louis.