$115+ Cheap flights from St. Louis (STL) to District of Columbia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from St. Louis to District of Columbia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to District of Columbia
Keep the following information in mind while searching for St. Louis to District of Columbia flight deals. Data was last updated June 12, 2025.
Round-trip from | $204 (Southwest) |
|---|---|
One-way from | $115 (American Airlines) |
Popular in | March |
Cheapest in | November |
Average price | $273 |
Good round-trip deal | $240 or less |
Good one-way deal | $138 or less |
Find flight deals from St. Louis to District of Columbia
Cheapest flights from St. Louis to District of ColumbiaExplore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from St. Louis to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Flightnetwork deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to District of Columbia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from St. Louis to District of Columbia that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisWashington, D.C.
STL - DCA
STLDCA
Lambert-St Louis
Mon 6/30
7:20 pm-10:20 pm
Nonstop2h 00m
Washington, D.C. Reagan-National
Thu 7/3
12:00 pm-1:10 pm
Nonstop2h 10m
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Wed 11/5
7:20 am-1:57 pm
1 stop5h 37m
Washington, D.C. Dulles Intl
Sat 11/8
6:10 am-9:35 am
1 stop4h 25m
St. LouisWashington, D.C.
STL - DCA
STLDCA
Lambert-St Louis
Fri 8/1
5:30 pm-10:42 pm
1 stop4h 12m
Washington, D.C. Reagan-National
Thu 8/7
7:25 am-12:27 pm
1 stop6h 02m
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Wed 9/24
9:17 am-3:52 pm
1 stop5h 35m
Washington, D.C. Dulles Intl
Fri 9/26
6:30 am-10:49 am
1 stop5h 19m
St. LouisWashington, D.C.
STL - DCA
STLDCA
Lambert-St Louis
Sat 8/30
6:02 am-9:03 am
Nonstop2h 01m
Washington, D.C. Reagan-National
Mon 9/1
7:51 pm-9:02 pm
Nonstop2h 11m
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Sat 7/12
2:52 pm-11:19 pm
1 stop7h 27m
Washington, D.C. Dulles Intl
Sat 7/19
6:10 am-1:59 pm
1 stop8h 49m
St. LouisWashington, D.C.
STL - DCA
STLDCA
Lambert-St Louis
Thu 8/21
5:11 pm-11:46 pm
1 stop5h 35m
Washington, D.C. Reagan-National
Sun 8/24
6:00 am-9:32 am
1 stop4h 32m
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Sun 8/17
7:20 am-3:20 pm
1 stop7h 00m
Washington, D.C. Dulles Intl
Wed 8/20
5:45 am-11:30 am
1 stop6h 45m
St. LouisWashington, D.C.
STL - DCA
STLDCA
Lambert-St Louis
Fri 8/1
7:29 pm-4:59 pm
1 stop20h 30m
Washington, D.C. Reagan-National
Fri 8/8
1:00 pm-9:11 am
1 stop21h 11m
St. LouisWashington, D.C.
STL - IAD
STLIAD
Lambert-St Louis
Sun 8/17
5:27 am-12:48 pm
1 stop6h 21m
Washington, D.C. Dulles Intl
Wed 8/20
4:36 pm-11:05 pm
1 stop7h 29m
Best time to book a flight from St. Louis to District of Columbia
Have a flexible travel schedule? Discover the best time to fly to District of Columbia from St. Louis with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to District of Columbia
What is the cheapest month to book a flight from St. Louis to District of Columbia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to District of Columbia (average of $241). Flying from St. Louis to District of Columbia in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from STL to DC?
Find hourly flight availability from St. Louis to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
When flying from St. Louis to District of Columbia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Rainfall in District of Columbia by month
Plan your trip to District of Columbia by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.
Temperature in District of Columbia by month
Plan your trip to District of Columbia by taking into account the average temperature totals by month.
If weather is an important factor for your trip to District of Columbia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).
Reviews of airlines servicing District of Columbia
Get insights into the airlines that provide service to District of Columbia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to District of Columbia. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from St. Louis to District of Columbia. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
John,May 2025
PVD - BNA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to District of Columbia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for St. Louis to District of Columbia
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from St. Louis to District of Columbia
Discover the top 5 airlines that operate flights from St. Louis to District of Columbia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$120 | Average$217 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$129 | Average$328 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$176 | Average$276 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$332 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$209 | Average$392 | FlexibilityNo cancel fee | On-time69% |