Flight Destinations in St. Mary's County

View ฿2,330 flight on Sat, 7 Feb 2026Opens in a new window

Popular airlines to St. Mary's County

  • Delta

    Delta

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • United

    United

  • Spirit Airlines

    Spirit Airlines

  • Frontier Airlines

    Frontier Airlines

  • British Airways

    British Airways

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

Prices were available within the past 7 days and start at ฿2,330 for one-way flights and ฿4,345 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿4,345 Return, found 1 day ago
฿4,345
Return
found 1 day ago
Select Delta flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿4,345 found 1 day ago
American Airlines
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿5,295 Return, found 1 day ago
฿5,295
Return
found 1 day ago
Select American Airlines flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿5,295 found 1 day ago
Delta
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿5,580 Return, found 1 day ago
฿5,580
Return
found 1 day ago
Select Delta flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿5,580 found 1 day ago
United
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿5,605 Return, found 1 day ago
฿5,605
Return
found 1 day ago
Select United flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿5,605 found 1 day ago
Delta
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿5,775 Return, found 1 day ago
฿5,775
Return
found 1 day ago
Select Delta flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿5,775 found 1 day ago
Delta
Tue, 13 Jan - Sat, 17 Jan
BOS
Boston
DCA
Washington
฿5,920 Return, found 1 day ago
฿5,920
Return
found 1 day ago
Select Delta flight, departing Tue, 13 Jan from Boston to Washington, returning Sat, 17 Jan, priced at ฿5,920 found 1 day ago
American Airlines
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿5,930 Return, found 1 day ago
฿5,930
Return
found 1 day ago
Select American Airlines flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿5,930 found 1 day ago
Delta
Fri, 16 Jan - Mon, 19 Jan
BOS
Boston
DCA
Washington
฿6,075 Return, found 1 day ago
฿6,075
Return
found 1 day ago
Select Delta flight, departing Fri, 16 Jan from Boston to Washington, returning Mon, 19 Jan, priced at ฿6,075 found 1 day ago
Air Canada
Thu, 23 Apr - Sat, 25 Apr
YTZ
Toronto
DCA
Washington
฿6,930 Return, found 1 day ago
฿6,930
Return
found 1 day ago
Select Air Canada flight, departing Thu, 23 Apr from Toronto to Washington, returning Sat, 25 Apr, priced at ฿6,930 found 1 day ago
Japan Airlines
Thu, 22 Jan - Wed, 4 Feb
SIN
Singapore
DCA
Washington
฿37,015 Return, found 1 day ago
฿37,015
Return
found 1 day ago
Select Japan Airlines flight, departing Thu, 22 Jan from Singapore to Washington, returning Wed, 4 Feb, priced at ฿37,015 found 1 day ago

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.

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. ฿4,345 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 ฿2,330 in the last seven days. Round-trip flights to St. Marys County ranged from ฿4,345 to ฿37,015 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 ฿4,345 to ฿37,015.
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.

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.

Air Canada
Wed, 11 Mar - Wed, 18 Mar
BKK
Bangkok
DCA
Washington
฿33,070 Return, found 4 days ago
฿33,070
Return
found 4 days ago
Select Air Canada flight, departing Wed, 11 Mar from Bangkok to Washington, returning Wed, 18 Mar, priced at ฿33,070 found 4 days ago
*Available to Expedia members.