$185 Cheap Flights from Washington (DCA) to Marion (MWA)

View $185 flight on Tue, Sep 23, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Marion, IL (MWA-Williamson County Regional)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Marion (DCA-MWA)

Prices were available within the past 7 days and start at $185 for one-way flights and $415 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 23 - Mon, Sep 29
DCA
Washington
MWA
Marion
$415 Roundtrip, found 6 days ago
$415
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 23 from Washington to Marion, returning Mon, Sep 29, priced at $415 found 6 days ago
United
Mon, Oct 20 - Wed, Nov 5
DCA
Washington
MWA
Marion
$435 Roundtrip, found 3 days ago
$435
Roundtrip
found 3 days ago
Select United flight, departing Mon, Oct 20 from Washington to Marion, returning Wed, Nov 5, priced at $435 found 3 days ago
United
Tue, Oct 21 - Wed, Nov 5
DCA
Washington
MWA
Marion
$438 Roundtrip, found 3 days ago
$438
Roundtrip
found 3 days ago
Select United flight, departing Tue, Oct 21 from Washington to Marion, returning Wed, Nov 5, priced at $438 found 3 days ago
United
Tue, Sep 23 - Fri, Sep 26
DCA
Washington
MWA
Marion
$443 Roundtrip, found 6 days ago
$443
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 23 from Washington to Marion, returning Fri, Sep 26, priced at $443 found 6 days ago
United
Thu, Oct 23 - Wed, Nov 5
DCA
Washington
MWA
Marion
$445 Roundtrip, found 3 days ago
$445
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 23 from Washington to Marion, returning Wed, Nov 5, priced at $445 found 3 days ago
United
Fri, Sep 26 - Mon, Sep 29
DCA
Washington
MWA
Marion
$450 Roundtrip, found 6 days ago
$450
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 26 from Washington to Marion, returning Mon, Sep 29, priced at $450 found 6 days ago
United
Thu, Oct 23 - Mon, Nov 3
DCA
Washington
MWA
Marion
$452 Roundtrip, found 4 days ago
$452
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 23 from Washington to Marion, returning Mon, Nov 3, priced at $452 found 4 days ago
United
Fri, Oct 31 - Tue, Nov 18
DCA
Washington
MWA
Marion
$461 Roundtrip, found 3 days ago
$461
Roundtrip
found 3 days ago
Select United flight, departing Fri, Oct 31 from Washington to Marion, returning Tue, Nov 18, priced at $461 found 3 days ago
American Airlines
Sat, Oct 18 - Sun, Oct 19
DCA
Washington
MWA
Marion
$470 Roundtrip, found 2 days ago
$470
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Oct 18 from Washington to Marion, returning Sun, Oct 19, priced at $470 found 2 days ago
Alaska Airlines
Sun, Sep 21 - Thu, Sep 25
DCA
Washington
MWA
Marion
$1,324 Roundtrip, found 12 hours ago
$1,324
Roundtrip
found 12 hours ago
Select Alaska Airlines flight, departing Sun, Sep 21 from Washington to Marion, returning Thu, Sep 25, priced at $1,324 found 12 hours ago
Flights from Washington (DCA) to Marion (MWA)
Origin airport
Ronald Reagan Washington National
Destination airport
Williamson County Regional
Roundtrip price
$415
Distance
652 mi

Washington to Marion Flights

The cheapest times to fly from Washington to Marion

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Marion are during the month of September. You can find some of the cheapest flights from Washington to Marion with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Marion

Sunday is one of the best days to book for cheap flights from Washington to Marion: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Marion

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Marion in 2025. You can also book with separate airlines for your outbound and return journeys, from $185 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Marion flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Marion airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA) cost?
Lock in a cheap one-way flight from $185 or cheap return flight from $415 from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA)?
September is the least expensive month to fly from DCA to MWA. Traveling during quieter months is often the key to finding better deals on flights.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest DCA to MWA flight.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA)?
You'll have to hop on a flight with a layover when traveling from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from DCA to MWA?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA)?
To avoid potential delays on the Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA) route, aim to travel before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA) last-minute?
Waiting until right before your break to book a ticket from DCA to MWA generally means paying more. While you may come across some last-minute offers, they're not always guaranteed. Be flexible with your itinerary to maximize your chances of landing a bargain.
Is it cheaper to book a DCA to MWA flight and hotel package?
You'll generally save money by booking a DCA to MWA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Williamson County Regional Airport (MWA)?
You can usually cancel or reschedule your DCA to MWA flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.