Flights from Seattle to Adelphi

Cheapest flights from Seattle

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

Mon, Dec 8 - Mon, Dec 8

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$226 Roundtrip, found 4 hours ago

$226

Roundtrip

found 4 hours ago

Select American Airlines flight, departing Mon, Dec 8 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Mon, Dec 8, priced at $226 found 4 hours ago

Wed, Jul 23 - Tue, Aug 5

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$280 Roundtrip, found 1 day ago

$280

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Jul 23 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Tue, Aug 5, priced at $280 found 1 day ago

Wed, Dec 10 - Thu, Dec 25

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$283 Roundtrip, found 4 hours ago

$283

Roundtrip

found 4 hours ago

Select American Airlines flight, departing Wed, Dec 10 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Thu, Dec 25, priced at $283 found 4 hours ago

Mon, Aug 18 - Fri, Aug 22

SEA

Seattle - Tacoma Intl.

DCA

Ronald Reagan Washington National

$285 Roundtrip, found 5 days ago

$285

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Aug 18 from Seattle - Tacoma Intl. to Ronald Reagan Washington National, returning Fri, Aug 22, priced at $285 found 5 days ago

Mon, Aug 18 - Fri, Aug 22

SEA

Seattle - Tacoma Intl.

DCA

Ronald Reagan Washington National

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select United flight, departing Mon, Aug 18 from Seattle - Tacoma Intl. to Ronald Reagan Washington National, returning Fri, Aug 22, priced at $287 found 5 days ago

Thu, Jul 31 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Thu, Jul 31 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $287 found 5 days ago

Mon, Aug 4 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select Delta flight, departing Mon, Aug 4 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $287 found 5 days ago

Wed, Jul 30 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$287 Roundtrip, found 6 days ago

$287

Roundtrip

found 6 days ago

Select United flight, departing Wed, Jul 30 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $287 found 6 days ago

Fri, Aug 1 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$297 Roundtrip, found 5 days ago

$297

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Fri, Aug 1 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $297 found 5 days ago

Thu, Jul 31 - Fri, Aug 8

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$297 Roundtrip, found 5 days ago

$297

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Thu, Jul 31 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Fri, Aug 8, priced at $297 found 5 days ago

Wed, Jul 23 - Fri, Aug 1

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$300 Roundtrip, found 1 day ago

$300

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Jul 23 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Fri, Aug 1, priced at $300 found 1 day ago

Mon, Aug 18 - Fri, Aug 22

SEA

Seattle - Tacoma Intl.

DCA

Ronald Reagan Washington National

$304 Roundtrip, found 5 days ago

$304

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Aug 18 from Seattle - Tacoma Intl. to Ronald Reagan Washington National, returning Fri, Aug 22, priced at $304 found 5 days ago

Mon, Dec 8 - Wed, Dec 24

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$306 Roundtrip, found 4 hours ago

$306

Roundtrip

found 4 hours ago

Select Hawaiian Airlines flight, departing Mon, Dec 8 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Wed, Dec 24, priced at $306 found 4 hours ago

Wed, Jul 30 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$307 Roundtrip, found 6 days ago

$307

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Jul 30 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $307 found 6 days ago

Thu, Jul 24 - Tue, Aug 5

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$308 Roundtrip, found 1 day ago

$308

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Tue, Aug 5, priced at $308 found 1 day ago

Fri, Aug 1 - Sat, Aug 9

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$316 Roundtrip, found 5 days ago

$316

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Fri, Aug 1 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Sat, Aug 9, priced at $316 found 5 days ago

Mon, Jul 21 - Mon, Jul 28

PAE

Seattle Paine Field Intl. Airport

IAD

Washington Dulles Intl.

$334 Roundtrip, found 6 days ago

$334

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Seattle Paine Field Intl. Airport to Washington Dulles Intl., returning Mon, Jul 28, priced at $334 found 6 days ago

Wed, Jul 30 - Tue, Aug 12

SEA

Seattle - Tacoma Intl.

IAD

Washington Dulles Intl.

$356 Roundtrip, found 6 days ago

$356

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Wed, Jul 30 from Seattle - Tacoma Intl. to Washington Dulles Intl., returning Tue, Aug 12, priced at $356 found 6 days ago

Sat, Jul 26 - Sat, Aug 2

SEA

Seattle - Tacoma Intl.

BWI

Baltimore Washington Intl. Thurgood Marshall

$493 Roundtrip, found 1 day ago

$493

Roundtrip

found 1 day ago

Select Sun Country Airlines flight, departing Sat, Jul 26 from Seattle - Tacoma Intl. to Baltimore Washington Intl. Thurgood Marshall, returning Sat, Aug 2, priced at $493 found 1 day ago

Mon, Aug 18 - Fri, Aug 22

SEA

Seattle - Tacoma Intl.

DCA

Ronald Reagan Washington National

$639 Roundtrip, found 5 days ago

$639

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Mon, Aug 18 from Seattle - Tacoma Intl. to Ronald Reagan Washington National, returning Fri, Aug 22, priced at $639 found 5 days ago