CA $144 Cheap Flights from Washington (DCA) to St. Louis (STL)

You can find one-way and return flights from DCA to STL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when DCA to STL ticket fares go up or down.

The cheapest months to fly from DCA to STL are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

There are 2 airlines offering direct flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.). These include:
* American Airlines operates 28 direct flights from Ronald Reagan Washington National to Lambert-St. Louis Intl. every week.
* Southwest Airlines operates 28 direct flights from Ronald Reagan Washington National to Lambert-St. Louis Intl. every week.

To find a cheap flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) will differ from traveler to traveler. If you like to fly early, American Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

You'll find approximately 8 nonstop flights per day from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.). For even more choices, look at flights that include layovers, as there are around 114 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Midway Intl. (MDW).

The earliest flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs at around 5:00 AM local time. This flight is operated by American Airlines. This is a seasonal service, active only in May. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll find the most flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) on Fridays, with around 72 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United. Flight schedules are fairly consistent throughout the week, with Fridays offering only slightly more options than other weekdays.

The most popular departure times for flights from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) are in the early morning, from 6am to 9am. Many major carriers, including Southwest Airlines, American Airlines and Delta, offer flights during this window. Many travellers prefer these times because it allows them to arrive at their destination early, giving them a full day for business or leisure activities.

A non-stop flight from Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically takes around 2 hours 30 minutes, covering a distance of approximately 1,154 kilometers. If you opt for a one-stop flight, your journey will usually be longer, averaging around 7 hours. Flights with two or more stops generally take even more time, often around 8 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.

You can fly business or first class between DCA and STL. You can fly business class with Frontier Airlines.

First class cabins are available on Alaska Airlines, Delta, United, and American Airlines.

It's easy to earn miles on a Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to St. Louis from Ronald Reagan Washington National (DCA), you can fly directly into Lambert-St. Louis International Airport (STL). Some flights may connect through major hubs like Hartsfield-Jackson Atlanta International Airport (ATL), Love Field (DAL), or John Glenn Columbus International Airport (CMH) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Washington, DC (DCA) to St. Louis, MO (STL) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Washington, DC (DCA) to St. Louis, MO (STL) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Washington, DC (DCA-Ronald Reagan Washington National) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.