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Seattle-Tacoma International Airport to Tri Cities Airport flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Tri Cities Airport over the next 90 days, with one-way fares from HK$854 and round-trip from HK$1,214. Based on Trip.com's latest 7-day flight data.

    • Cheapest
      SEA 21:35
      1h 11m
      Nonstop
      PSC 22:46
      Seattle - Pasco | Tue, Nov 10 | Delta Air Lines
      HK$854 HK$1,890
      55% off
      55% off
      HK$1,890 HK$854
    • SEA 10:39
      1h 9m
      Nonstop
      PSC 11:48
      Seattle - Pasco | Fri, Nov 13 | Delta Air Lines
      HK$897 HK$1,890
      53% off
      53% off
      HK$1,890 HK$897
    • SEA 10:39
      1h 9m
      Nonstop
      PSC 11:48
      Seattle - Pasco | Sat, Nov 14 | Delta Air Lines
      HK$897 HK$1,890
      53% off
      53% off
      HK$1,890 HK$897
    • SEA 22:55
      1h 4m
      Nonstop
      PSC 23:59
      Seattle - Pasco | Tue, Dec 1 | Delta Air Lines
      HK$1,227
      35% off
      HK$1,890 HK$1,227
    • SEA 15:55
      1h
      Nonstop
      PSC 16:55
      Seattle - Pasco | Sun, Nov 29 | Alaska Airlines
      HK$1,296
      31% off
      HK$1,890 HK$1,296
    • SEA 15:50
      1h 4m
      Nonstop
      PSC 16:54
      Seattle - Pasco | Tue, Nov 10 | Alaska Airlines
      HK$1,343
      28% off
      HK$1,890 HK$1,343
    • SEA 10:49
      1h 13m
      Nonstop
      PSC 12:02
      Seattle - Pasco | Tue, Oct 20 | Delta Air Lines
      HK$1,348
      28% off
      HK$1,890 HK$1,348
    • SEA 13:40
      1h 12m
      Nonstop
      PSC 14:52
      Seattle - Pasco | Sat, Nov 7 | Delta Air Lines
      HK$1,349
      28% off
      HK$1,890 HK$1,349
    • SEA 10:49
      1h 13m
      Nonstop
      PSC 12:02
      Seattle - Pasco | Sun, Oct 25 | Delta Air Lines
      HK$1,387
      27% off
      HK$1,890 HK$1,387
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      More cheap flights
      More cheap flights
    • Cheapest nonstop
      SEA 13:45
      1h 8m
      Nonstop
      PSC 14:53
      Seattle - Pasco | Mon, Nov 16 | Delta Air Lines
      PSC 12:35
      1h 18m
      Nonstop
      SEA 13:53
      Pasco - Seattle | Wed, Nov 18 | Delta Air Lines
      HK$1,214 HK$6,094
      80% off
      80% off
      HK$6,094 HK$1,214
    • SEA 09:14
      1h 11m
      Nonstop
      PSC 10:25
      Seattle - Pasco | Mon, Nov 16 | Alaska Airlines
      PSC 17:34
      1h 13m
      Nonstop
      SEA 18:47
      Pasco - Seattle | Wed, Nov 18 | Alaska Airlines
      HK$1,394 HK$6,094
      77% off
      77% off
      HK$6,094 HK$1,394
    • SEA 12:10
      1h 2m
      Nonstop
      PSC 13:12
      Seattle - Pasco | Mon, Nov 16 | American Airlines
      PSC 12:35
      1h 18m
      Nonstop
      SEA 13:53
      Pasco - Seattle | Wed, Nov 18 | Delta Air Lines
      HK$2,554 HK$6,094
      57% off
      57% off
      HK$6,094 HK$2,554
    • SEA 08:00
      1h 4m
      Nonstop
      PSC 09:04
      Seattle - Pasco | Sat, Nov 28 | Alaska Airlines
      PSC 19:44
      1h 16m
      Nonstop
      SEA 21:00
      Pasco - Seattle | Wed, Dec 2 | Alaska Airlines
      HK$3,487
      43% off
      HK$6,094 HK$3,487
    • SEA 13:38
      1h
      Nonstop
      PSC 14:38
      Seattle - Pasco | Sat, Nov 28 | American Airlines
      PSC 09:41
      1h 13m
      Nonstop
      SEA 10:54
      Pasco - Seattle | Wed, Dec 2 | American Airlines
      HK$4,509
      26% off
      HK$6,094 HK$4,509
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      PSC 15:00
      6h
      Nonstop
      SEA 16:00
      Pasco - Seattle | Sun, Oct 18 | Normal Airline
      More cheap flights
      More cheap flights
    • Cheapest nonstop
      SEA 08:00
      1h 4m
      Nonstop
      PSC 09:04
      Seattle - Pasco | Sun, Nov 29 | Alaska Airlines
      HK$1,929 HK$2,737
      30% off
      30% off
      HK$2,737 HK$1,929
    • SEA 15:50
      1h 4m
      Nonstop
      PSC 16:54
      Seattle - Pasco | Sun, Nov 1 | Alaska Airlines
      HK$1,949 HK$2,737
      28% off
      28% off
      HK$2,737 HK$1,949
    • SEA 16:17
      1h 6m
      Nonstop
      PSC 17:23
      Seattle - Pasco | Wed, Oct 21 | Alaska Airlines
      HK$1,952 HK$2,737
      28% off
      28% off
      HK$2,737 HK$1,952
    • SEA 22:52
      1h 7m
      Nonstop
      PSC 23:59
      Seattle - Pasco | Sun, Nov 1 | Delta Air Lines
      HK$2,025
      26% off
      HK$2,737 HK$2,025
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      More cheap flights
      More cheap flights
    • Cheapest nonstop
      SEA 08:00
      1h 4m
      Nonstop
      PSC 09:04
      Seattle - Pasco | Sun, Nov 29 | Alaska Airlines
      HK$1,929 HK$2,737
      30% off
      30% off
      HK$2,737 HK$1,929
    • SEA 15:50
      1h 4m
      Nonstop
      PSC 16:54
      Seattle - Pasco | Sun, Nov 1 | Alaska Airlines
      HK$1,949 HK$2,737
      28% off
      28% off
      HK$2,737 HK$1,949
    • SEA 16:17
      1h 6m
      Nonstop
      PSC 17:23
      Seattle - Pasco | Wed, Oct 21 | Alaska Airlines
      HK$1,952 HK$2,737
      28% off
      28% off
      HK$2,737 HK$1,952
    • SEA 22:52
      1h 7m
      Nonstop
      PSC 23:59
      Seattle - Pasco | Sun, Nov 1 | Delta Air Lines
      HK$2,025
      26% off
      HK$2,737 HK$2,025
    • SEA 19:58
      2h 56m
      1 stop
      PSC 22:54
      Seattle - Pasco | Wed, Oct 28 | Alaska Airlines
      HK$1,783
      35% off
      HK$2,737 HK$1,783
    • SEA 19:54
      2h 55m
      1 stop
      PSC 22:49
      Seattle - Pasco | Sat, Nov 7 | Alaska Airlines
      HK$1,802
      34% off
      HK$2,737 HK$1,802
    • SEA 12:02
      3h 21m
      1 stop
      PSC 15:23
      Seattle - Pasco | Sun, Nov 1 | Alaska Airlines
      HK$1,984
      28% off
      HK$2,737 HK$1,984
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      More cheap flights
      More cheap flights
    • Cheapest nonstop
      SEA 16:17
      1h 6m
      Nonstop
      PSC 17:23
      Seattle - Pasco | Wed, Oct 21 | Alaska Airlines
      HK$1,952 HK$2,638
      26% off
      26% off
      HK$2,638 HK$1,952
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      More cheap flights
      More cheap flights
    • SEA 22:49
      59m
      Nonstop
      PSC 23:48
      Seattle - Pasco | Sun, Nov 1 | Alaska Airlines
      HK$1,949 HK$4,257
      54% off
      54% off
      HK$4,257 HK$1,949
    • SEA 13:38
      1h
      Nonstop
      PSC 14:38
      Seattle - Pasco | Sun, Nov 29 | American Airlines
      HK$3,150 HK$4,257
      26% off
      26% off
      HK$4,257 HK$3,150
    • SEA 13:00
      17h 25m
      1 stop
      PSC 14:00
      Seattle - Pasco | Fri, Oct 16 | Normal Airline
      More cheap flights
      More cheap flights

Displayed flight fares from Seattle to Pasco are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Tri Cities Airport

Which month offers the lowest one-way fares when flying from Seattle-Tacoma International Airport to Tri Cities Airport?

Data is based on the past 12 months. It shows the average one-way fares by month for flights from Seattle-Tacoma International Airport to Tri Cities Airport on Trip.com.

Based on Trip.com data from the past 12 months, for cheaper one-way flights from Seattle-Tacoma International Airport to Tri Cities Airport, it is best to book in February, when average fares are HK$666. Try to avoid November, as fares peak at around HK$1,985.

HK$1,985
HK$1,326
HK$666
HK$7
    Cheapest
  • HK$1,283
    Oct
  • HK$1,985
    Nov
  • HK$1,439
    Dec
  • HK$1,869
    Jan
  • HK$666
    Feb
  • HK$1,328
    Mar
  • HK$1,124
    Apr
  • HK$1,028
    May
  • HK$1,539
    Jun
  • HK$1,044
    Jul
  • HK$1,607
    Aug
  • HK$1,948
    Sep

Which day of the week offers the cheapest flights from Seattle-Tacoma International Airport to Tri Cities Airport?

Data is based on the past 12 months. It shows the average fares by day of the week for flights from Seattle-Tacoma International Airport to Tri Cities Airport on Trip.com.

Based on Trip.com data from the past 12 months, the cheapest day to depart from Seattle-Tacoma International Airport to Tri Cities Airport is Wednesday, when average fares are usually lower than other days. Avoid departing on Saturday, as fares are typically the highest.

HK$1,985
HK$1,415
HK$845
HK$275
    Cheapest
  • HK$1,406
    Mon
  • HK$1,538
    Tue
  • HK$845
    Wed
  • HK$1,111
    Thu
  • HK$1,581
    Fri
  • HK$1,985
    Sat
  • HK$1,733
    Sun

Which airline offers the cheapest flights from Seattle-Tacoma International Airport to Tri Cities Airport?

The cheapest airline flying from Seattle-Tacoma International Airport to Tri Cities Airport is Alaska Airlines (from HK$886) among 4 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Alaska Airlines
From HK$886
American Airlines
From HK$1,484
Delta Air Lines
From HK$1,986
United Airlines
From HK$2,528

Find more flights and airlines

What is the flight schedule from Seattle-Tacoma International Airport to Tri Cities Airport?

Check on the flight schedule from Seattle to Pasco to find the flight that matches your travel plan.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS2448

    Seattle-Tacoma International Airport

    22:53

    SEA

    59m

    23:52

    PSC

    S M T W T F S
    Search

  2. DL4017

    Seattle-Tacoma International Airport

    22:35

    SEA

    1h 3m

    23:38

    PSC

    S M T W T F S
    Search

  3. AA9342

    Seattle-Tacoma International Airport

    18:20

    SEA

    1h 2m

    19:22

    PSC

    S M T W T F S
    Search

  4. AS3110

    Seattle-Tacoma International Airport

    09:05

    SEA

    1h 5m

    10:10

    PSC

    S M T W T F S
    Search

  5. AA9297

    Seattle-Tacoma International Airport

    13:47

    SEA

    1h 6m

    14:53

    PSC

    S M T W T F S
    Search

  6. DL3992

    Seattle-Tacoma International Airport

    10:49

    SEA

    1h 13m

    12:02

    PSC

    S M T W T F S
    Search

  7. DL3891

    Seattle-Tacoma International Airport

    13:36

    SEA

    1h 14m

    14:50

    PSC

    S M T W T F S
    Search

  8. AS2425

    Seattle-Tacoma International Airport

    18:58

    SEA

    56m

    Nonstop

    19:54

    PDX

    S M T W T F S
    Search

  9. AS3409

    Portland International Airport

    21:59

    PDX

    55m

    Nonstop

    22:54

    PSC

    S M T W T F S
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About Seattle-Tacoma International Airport and Tri Cities Airport

Learn about Seattle-Tacoma International Airport (SEA) and Tri Cities Airport (PSC) — including location, terminals, transportation, and travel tips.

Flight distance 276.09 km
Cheapest one-way ticket price HK$854
Cheapest return ticket price HK$1,214

FAQs for Seattle-Tacoma International Airport to Tri Cities Airport Flights

  • How long is the flight from Seattle-Tacoma International Airport to Tri Cities Airport?

    Seattle-Tacoma International Airport to Tri Cities Airport takes about 36 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 6 daily flights from Seattle-Tacoma International Airport (SEA) to Tri Cities Airport (PSC).
  • The earliest flight from Seattle-Tacoma International Airport to Tri Cities Airport departs at 09:05, and the last departs at 22:53, with about 14 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle-Tacoma International Airport (SEA) to Tri Cities Airport (PSC) is quite popular. Without considering departure times or holidays, tickets cost around HK$2,497 in October, the most expensive month to book this route.
  • The earliest flight departs from Seattle-Tacoma International Airport at 08:23 and arrives in Tri Cities Airport at 09:32.
  • The latest flight departs from Seattle-Tacoma International Airport at 21:59 and arrives in Tri Cities Airport at 23:08.
    • The distance from Tri Cities Airport to downtown is about 2 km, by taxi about 20 minutes.
  • The closest airport to Tri Cities Airport (PSC) is Walla Walla Regional Airport. The distance is around 67 km.
  • Delta Air Lines is a very popular airline operating an average of 134 flights per month.
  • One-way flights from Seattle-Tacoma International Airport to Tri Cities Airport currently start from HK$854, and round-trip fares start from HK$1,214. The current lowest fare is a Delta Air Lines flight departing on Tue, Nov 10; prices may vary depending on availability.
  • Yes. Alaska Airlines and Delta Air Lines operate direct flights from Seattle-Tacoma International Airport to Tri Cities Airport, with an average flight time of 35 minutes, and around 48 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Seattle-Tacoma International Airport to Tri Cities Airport is HK$2,356. Prices may vary depending on the departure date, airline, and availability.
  • WestJet are the most popular budget airlines flying from Seattle-Tacoma International Airport to Tri Cities Airport, with one-way fares starting from HK$854. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Seattle-Tacoma International Airport to Tri Cities Airport operates around 49 weekly flights, mainly by Alaska Airlines and Delta Air Lines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle-Tacoma International Airport and Tri Cities Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.