Flights from Seattle to Harlingen

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.

Wed, Nov 19 - Sat, Dec 6

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$307 Roundtrip, found 2 days ago

$307

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Nov 19 from Seattle - Tacoma Intl. to Valley Intl., returning Sat, Dec 6, priced at $307 found 2 days ago

Wed, Nov 19 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$343 Roundtrip, found 2 days ago

$343

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Nov 19 from Seattle - Tacoma Intl. to Valley Intl., returning Wed, Dec 3, priced at $343 found 2 days ago

Wed, Nov 19 - Fri, Dec 5

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$367 Roundtrip, found 2 days ago

$367

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Nov 19 from Seattle - Tacoma Intl. to Valley Intl., returning Fri, Dec 5, priced at $367 found 2 days ago

Fri, Nov 21 - Sat, Dec 6

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$372 Roundtrip, found 2 days ago

$372

Roundtrip

found 2 days ago

Select United flight, departing Fri, Nov 21 from Seattle - Tacoma Intl. to Valley Intl., returning Sat, Dec 6, priced at $372 found 2 days ago

Thu, Nov 20 - Fri, Dec 5

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$397 Roundtrip, found 2 days ago

$397

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Fri, Dec 5, priced at $397 found 2 days ago

Thu, Nov 20 - Thu, Dec 4

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$402 Roundtrip, found 2 days ago

$402

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Thu, Dec 4, priced at $402 found 2 days ago

Thu, Nov 20 - Thu, Dec 4

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$407 Roundtrip, found 2 days ago

$407

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Thu, Dec 4, priced at $407 found 2 days ago

Tue, Nov 18 - Fri, Dec 5

SEA

Seattle - Tacoma Intl.

BRO

Brownsville-South Padre Island Intl.

$409 Roundtrip, found 2 days ago

$409

Roundtrip

found 2 days ago

Select United flight, departing Tue, Nov 18 from Seattle - Tacoma Intl. to Brownsville-South Padre Island Intl., returning Fri, Dec 5, priced at $409 found 2 days ago

Sun, Nov 16 - Fri, Dec 5

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$412 Roundtrip, found 2 days ago

$412

Roundtrip

found 2 days ago

Select United flight, departing Sun, Nov 16 from Seattle - Tacoma Intl. to Valley Intl., returning Fri, Dec 5, priced at $412 found 2 days ago

Tue, Nov 18 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

BRO

Brownsville-South Padre Island Intl.

$414 Roundtrip, found 2 days ago

$414

Roundtrip

found 2 days ago

Select American Airlines flight, departing Tue, Nov 18 from Seattle - Tacoma Intl. to Brownsville-South Padre Island Intl., returning Wed, Dec 3, priced at $414 found 2 days ago

Sun, Nov 16 - Fri, Dec 5

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$417 Roundtrip, found 2 days ago

$417

Roundtrip

found 2 days ago

Select United flight, departing Sun, Nov 16 from Seattle - Tacoma Intl. to Valley Intl., returning Fri, Dec 5, priced at $417 found 2 days ago

Thu, Nov 20 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$422 Roundtrip, found 2 days ago

$422

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Wed, Dec 3, priced at $422 found 2 days ago

Tue, Nov 18 - Tue, Dec 2

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$429 Roundtrip, found 2 days ago

$429

Roundtrip

found 2 days ago

Select United flight, departing Tue, Nov 18 from Seattle - Tacoma Intl. to Valley Intl., returning Tue, Dec 2, priced at $429 found 2 days ago

Sat, Nov 22 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$433 Roundtrip, found 2 days ago

$433

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Nov 22 from Seattle - Tacoma Intl. to Valley Intl., returning Wed, Dec 3, priced at $433 found 2 days ago

Sat, Nov 15 - Tue, Dec 2

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$434 Roundtrip, found 2 days ago

$434

Roundtrip

found 2 days ago

Select United flight, departing Sat, Nov 15 from Seattle - Tacoma Intl. to Valley Intl., returning Tue, Dec 2, priced at $434 found 2 days ago

Sun, Nov 16 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

BRO

Brownsville-South Padre Island Intl.

$439 Roundtrip, found 2 days ago

$439

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sun, Nov 16 from Seattle - Tacoma Intl. to Brownsville-South Padre Island Intl., returning Wed, Dec 3, priced at $439 found 2 days ago

Thu, Nov 20 - Tue, Dec 2

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$457 Roundtrip, found 2 days ago

$457

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Tue, Dec 2, priced at $457 found 2 days ago

Fri, Nov 21 - Wed, Dec 3

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$458 Roundtrip, found 2 days ago

$458

Roundtrip

found 2 days ago

Select American Airlines flight, departing Fri, Nov 21 from Seattle - Tacoma Intl. to Valley Intl., returning Wed, Dec 3, priced at $458 found 2 days ago

Thu, Nov 20 - Tue, Dec 2

SEA

Seattle - Tacoma Intl.

HRL

Valley Intl.

$462 Roundtrip, found 2 days ago

$462

Roundtrip

found 2 days ago

Select United flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Valley Intl., returning Tue, Dec 2, priced at $462 found 2 days ago

Thu, Nov 20 - Sun, Nov 30

SEA

Seattle - Tacoma Intl.

BRO

Brownsville-South Padre Island Intl.

$1,063 Roundtrip, found 2 days ago

$1,063

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Thu, Nov 20 from Seattle - Tacoma Intl. to Brownsville-South Padre Island Intl., returning Sun, Nov 30, priced at $1,063 found 2 days ago