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Cheap flights to St. Mary's County

View €43 flight on Mon, 24 Aug 2026Opens in a new window

Popular airlines to St. Mary's County

  • Frontier Airlines

  • Delta

  • American Airlines

  • United

  • Southwest Airlines

  • JetBlue Airways

  • Alaska Airlines

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Cheap round-trip flights to St. Mary's County

Prices were available within the past 7 days and start at €43 for one-way flights and €86 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, 10 Sept - Mon, 14 Sept
BOS
Boston
DCA
Washington
€86 Return, found 3 days ago
€86
Return
found 3 days ago
Select American Airlines flight, departing Thu, 10 Sept from Boston to Washington, returning Mon, 14 Sept, priced at €86 found 3 days ago
JetBlue Airways
Thu, 13 Aug - Mon, 17 Aug
BOS
Boston
DCA
Washington
€86 Return, found 2 days ago
€86
Return
found 2 days ago
Select JetBlue Airways flight, departing Thu, 13 Aug from Boston to Washington, returning Mon, 17 Aug, priced at €86 found 2 days ago
Delta
Thu, 13 Aug - Mon, 17 Aug
BOS
Boston
DCA
Washington
€103 Return, found 2 days ago
€103
Return
found 2 days ago
Select Delta flight, departing Thu, 13 Aug from Boston to Washington, returning Mon, 17 Aug, priced at €103 found 2 days ago
Delta
Mon, 1 Feb - Mon, 1 Mar
EWR
New York
DCA
Washington
€201 Return, found 5 days ago
€201
Return
found 5 days ago
Select Delta flight, departing Mon, 1 Feb from New York to Washington, returning Mon, 1 Mar, priced at €201 found 5 days ago
American Airlines
Sat, 5 Sept - Sat, 12 Sept
LAX
Los Angeles
DCA
Washington
€208 Return, found 3 days ago
€208
Return
found 3 days ago
Select American Airlines flight, departing Sat, 5 Sept from Los Angeles to Washington, returning Sat, 12 Sept, priced at €208 found 3 days ago
American Airlines
Sat, 5 Sept - Sun, 6 Sept
DFW
Dallas
DCA
Washington
€209 Return, found 5 days ago
€209
Return
found 5 days ago
Select American Airlines flight, departing Sat, 5 Sept from Dallas to Washington, returning Sun, 6 Sept, priced at €209 found 5 days ago
United
Sat, 5 Sept - Sun, 6 Sept
BOS
Boston
DCA
Washington
€236 Return, found 4 days ago
€236
Return
found 4 days ago
Select United flight, departing Sat, 5 Sept from Boston to Washington, returning Sun, 6 Sept, priced at €236 found 4 days ago
Delta
Sat, 15 Aug - Mon, 17 Aug
DAL
Dallas
DCA
Washington
€292 Return, found 1 day ago
€292
Return
found 1 day ago
Select Delta flight, departing Sat, 15 Aug from Dallas to Washington, returning Mon, 17 Aug, priced at €292 found 1 day ago
British Airways
Thu, 3 Dec - Wed, 9 Dec
LIS
Lisbon
DCA
Washington
€450 Return, found 2 days ago
€450
Return
found 2 days ago
Select British Airways flight, departing Thu, 3 Dec from Lisbon to Washington, returning Wed, 9 Dec, priced at €450 found 2 days ago
British Airways
Thu, 17 Sept - Wed, 30 Sept
OPO
Porto
DCA
Washington
€457 Return, found 5 days ago
€457
Return
found 5 days ago
Select British Airways flight, departing Thu, 17 Sept from Porto to Washington, returning Wed, 30 Sept, priced at €457 found 5 days ago

Trending flights to St. Mary's County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Thu, 3 Sept - Mon, 7 Sept
DUB
Dublin
DCA
Washington
€457 Return, found 3 days ago
€457
Return
found 3 days ago
Select JetBlue Airways flight, departing Thu, 3 Sept from Dublin to Washington, returning Mon, 7 Sept, priced at €457 found 3 days ago

Frequently asked questions

How do I find cheap flights to St. Marys County that have flexible change policies?
It's as easy as can be with Expedia. Firstly, type in your travel details and click the "Search" button. Step 2? Check the "No change fee" box below the "Flexible change policies" filter on the top left of your screen. Step 3. Reserve your cheap and flexible airfare to St. Marys County.
Which airlines fly to St. Marys County?
A variety of airlines fly to destinations in or near St. Marys County. Your next big adventure is a few clicks away with these popular carriers:

  • American Airlines - 7,501 flights to or near St. Marys County each month, including 7,284 flights to Ronald Reagan Washington National Airport (DCA) and 216 flights to Washington Dulles Intl. Airport (IAD) per month.
  • United Airlines - 5,939 flights to or near St. Marys County each month, including 5,146 flights to Washington Dulles Intl. Airport (IAD) and 793 flights to Ronald Reagan Washington National Airport (DCA) per month.
  • Delta Air Lines - 2,036 flights to or near St. Marys County each month, including 1,516 flights to Ronald Reagan Washington National Airport (DCA) and 520 flights to Washington Dulles Intl. Airport (IAD) per month.

How can I find cheap tickets to St. Marys County?
You'll always score an epic deal with Expedia, but our "flexible dates" feature makes it even easier. Enter your preferred flight date, then click on the flexible dates link above to see the cheapest prices for nearby days. €86 was the lowest price for a flight to St. Marys County in the last seven days.
How much is a flight to St. Marys County?
If you were flying one way from Boston (BOS), you could've picked up a low-cost fare for €43 in the last seven days. Round-trip flights to St. Marys County ranged from €86 to €457 during this same period.
What are the most popular airports to fly into in St. Marys County?
Pack your suitcase and touch down at one of these leading St. Marys County airports:

  • Ronald Reagan Washington National Airport (DCA) - 11,555 flights per month.
  • Washington Dulles Intl. Airport (IAD) - 6,533 flights per month.

How much is a plane ticket to St. Marys County?
In the last seven days, fares to St. Marys County fluctuated from €86 to €457.
What is the best time to go to St. Marys County?
A nice time to visit St. Marys County, along with the exciting city of California, is over the lively months of May, July and September. Summer here begins June 20, and you can expect temperatures of between 21ºC and 27ºC if you visit then. This warmer weather is perfect for wandering around this city's attractions.
What months are the cheapest to book a flight to St. Marys County?
To grab an awesome deal to St. Marys County, try to book sometime in February when airfares are at their lowest. When's the most expensive time? In the United States, it's the month of December.

Book with confidence

About St. Mary's County

Expedia offers flights to St. Mary's County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to St. Mary's County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About St. Mary's County
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