Cheap flights from Seattle to Tri-Cities

View AU$105 flight on Tue, 19 Aug. 2025Opens in a new window

Popular airlines from Seattle to Tri-Cities

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • American Airlines

    American Airlines

  • United

    United

  • Hawaiian Airlines

    Hawaiian Airlines

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Cheap Flights from Seattle (SEA) to Tri-Cities (PSC)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$149 Return, found 4 days ago
AU$149
Return
found 4 days ago
Select Alaska Airlines flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$149 found 4 days ago
Alaska Airlines
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$164 Return, found 4 days ago
AU$164
Return
found 4 days ago
Select Alaska Airlines flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$164 found 4 days ago
Alaska Airlines
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$179 Return, found 4 days ago
AU$179
Return
found 4 days ago
Select Alaska Airlines flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$179 found 4 days ago
Delta
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$180 Return, found 4 days ago
AU$180
Return
found 4 days ago
Select Delta flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$180 found 4 days ago
American Airlines
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$376 Return, found 4 days ago
AU$376
Return
found 4 days ago
Select American Airlines flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$376 found 4 days ago
United
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
PSC
Pasco
AU$1,017 Return, found 4 days ago
AU$1,017
Return
found 4 days ago
Select United flight, departing Tue, 19 Aug. from Seattle to Pasco, returning Tue, 26 Aug., priced at AU$1,017 found 4 days ago

Find the cheapest month to fly from Seattle (SEA) to Pasco (PSC)

February is typically the cheapest month to fly

From AU$118 - AU$333 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.