Flights from Baltimore to Union

Cheapest flights from Baltimore

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.

Tue, Jun 10 - Thu, Jun 12

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$207 Roundtrip, found 1 day ago

$207

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Jun 10 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Thu, Jun 12, priced at $207 found 1 day ago

Tue, May 20 - Sat, May 24

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$208 Roundtrip, found 5 days ago

$208

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sat, May 24, priced at $208 found 5 days ago

Tue, May 20 - Sun, May 25

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$218 Roundtrip, found 5 days ago

$218

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sun, May 25, priced at $218 found 5 days ago

Wed, May 21 - Sat, May 24

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$228 Roundtrip, found 5 days ago

$228

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, May 21 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sat, May 24, priced at $228 found 5 days ago

Wed, May 21 - Sun, May 25

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$238 Roundtrip, found 5 days ago

$238

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, May 21 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sun, May 25, priced at $238 found 5 days ago

Tue, May 20 - Tue, May 27

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Tue, May 20 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Tue, May 27, priced at $248 found 5 days ago

Mon, May 19 - Sun, May 25

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, May 19 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sun, May 25, priced at $248 found 5 days ago

Mon, Jun 9 - Tue, Jun 17

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$251 Roundtrip, found 1 day ago

$251

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Mon, Jun 9 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Tue, Jun 17, priced at $251 found 1 day ago

Wed, Jun 11 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$259 Roundtrip, found 1 day ago

$259

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Jun 11 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $259 found 1 day ago

Tue, May 20 - Fri, May 23

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$260 Roundtrip, found 5 days ago

$260

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Tue, May 20 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Fri, May 23, priced at $260 found 5 days ago

Wed, Jun 11 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$261 Roundtrip, found 1 day ago

$261

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Jun 11 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $261 found 1 day ago

Mon, Jun 9 - Thu, Jun 12

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$263 Roundtrip, found 1 day ago

$263

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 9 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Thu, Jun 12, priced at $263 found 1 day ago

Thu, May 22 - Mon, May 26

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$264 Roundtrip, found 5 days ago

$264

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Thu, May 22 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Mon, May 26, priced at $264 found 5 days ago

Thu, May 22 - Mon, May 26

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 5 days ago

$268

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Thu, May 22 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Mon, May 26, priced at $268 found 5 days ago

Fri, May 23 - Sun, May 25

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$276 Roundtrip, found 5 days ago

$276

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Fri, May 23 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, May 25, priced at $276 found 5 days ago

Wed, Jun 11 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$279 Roundtrip, found 1 day ago

$279

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jun 11 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $279 found 1 day ago

Sat, Jun 14 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$287 Roundtrip, found 1 day ago

$287

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Sat, Jun 14 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $287 found 1 day ago

Wed, Jun 11 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$332 Roundtrip, found 1 day ago

$332

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Wed, Jun 11 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $332 found 1 day ago

Wed, Jun 11 - Sun, Jun 15

BWI

Baltimore Washington Intl. Thurgood Marshall

SEA

Seattle - Tacoma Intl.

$397 Roundtrip, found 1 day ago

$397

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Jun 11 from Baltimore Washington Intl. Thurgood Marshall to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $397 found 1 day ago

Wed, Jun 11 - Sun, Jun 15

DCA

Ronald Reagan Washington National

SEA

Seattle - Tacoma Intl.

$665 Roundtrip, found 1 day ago

$665

Roundtrip

found 1 day ago

Select United flight, departing Wed, Jun 11 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sun, Jun 15, priced at $665 found 1 day ago