Cheap flights to St. Mary's County

View €37 flight on Sat, 2 May 2026Opens in a new window

Popular airlines to St. Mary's County

  • American Airlines

  • Delta

  • Frontier Airlines

  • Spirit Airlines

  • Southwest Airlines

  • United

  • Alaska Airlines

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at €37 for one-way flights and €79 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Sat, 25 Apr - Tue, 28 Apr
LGA
New York
DCA
Washington
€79 Return, found 2 days ago
€79
Return
found 2 days ago
Select JetBlue Airways flight, departing Sat, 25 Apr from New York to Washington, returning Tue, 28 Apr, priced at €79 found 2 days ago
JetBlue Airways
Thu, 16 Apr - Sun, 19 Apr
JFK
New York
DCA
Washington
€100 Return, found 8 hours ago
€100
Return
found 8 hours ago
Select JetBlue Airways flight, departing Thu, 16 Apr from New York to Washington, returning Sun, 19 Apr, priced at €100 found 8 hours ago
JetBlue Airways
Wed, 18 Mar - Wed, 18 Mar
BOS
Boston
DCA
Washington
€145 Return, found 6 hours ago
€145
Return
found 6 hours ago
Select JetBlue Airways flight, departing Wed, 18 Mar from Boston to Washington, returning Wed, 18 Mar, priced at €145 found 6 hours ago
United
Fri, 1 May - Sat, 2 May
EWR
New York
DCA
Washington
€161 Return, found 5 days ago
€161
Return
found 5 days ago
Select United flight, departing Fri, 1 May from New York to Washington, returning Sat, 2 May, priced at €161 found 5 days ago
American Airlines
Fri, 17 Apr - Sun, 19 Apr
YYZ
Toronto
DCA
Washington
€208 Return, found 14 hours ago
€208
Return
found 14 hours ago
Select American Airlines flight, departing Fri, 17 Apr from Toronto to Washington, returning Sun, 19 Apr, priced at €208 found 14 hours ago
American Airlines
Sat, 18 Apr - Mon, 20 Apr
TPA
Tampa
DCA
Washington
€219 Return, found 1 day ago
€219
Return
found 1 day ago
Select American Airlines flight, departing Sat, 18 Apr from Tampa to Washington, returning Mon, 20 Apr, priced at €219 found 1 day ago
JetBlue Airways
Wed, 22 Apr - Wed, 29 Apr
DUB
Dublin
DCA
Washington
€405 Return, found 9 hours ago
€405
Return
found 9 hours ago
Select JetBlue Airways flight, departing Wed, 22 Apr from Dublin to Washington, returning Wed, 29 Apr, priced at €405 found 9 hours ago
Lufthansa
Fri, 3 Apr - Tue, 7 Apr
SNN
Shannon
DCA
Washington
€474 Return, found 6 days ago
€474
Return
found 6 days ago
Select Lufthansa flight, departing Fri, 3 Apr from Shannon to Washington, returning Tue, 7 Apr, priced at €474 found 6 days ago
British Airways
Wed, 29 Apr - Mon, 4 May
LHR
London
DCA
Washington
€479 Return, found 3 days ago
€479
Return
found 3 days ago
Select British Airways flight, departing Wed, 29 Apr from London to Washington, returning Mon, 4 May, priced at €479 found 3 days ago
Cape Air
Sat, 21 Mar - Mon, 23 Mar
ACK
Nantucket
DCA
Washington
€504 Return, found 9 hours ago
€504
Return
found 9 hours ago
Select Cape Air flight, departing Sat, 21 Mar from Nantucket to Washington, returning Mon, 23 Mar, priced at €504 found 9 hours 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
Wed, 22 Apr - Wed, 29 Apr
DUB
Dublin
DCA
Washington
€405 Return, found 9 hours ago
€405
Return
found 9 hours ago
Select JetBlue Airways flight, departing Wed, 22 Apr from Dublin to Washington, returning Wed, 29 Apr, priced at €405 found 9 hours 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. €79 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 New York (LGA), you could've picked up a low-cost fare for €37 in the last seven days. Round-trip flights to St. Marys County ranged from €79 to €504 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 €79 to €504.
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

Explore a world of travel with Expedia

*Available to Expedia members.