Pasco (PSC) to Seattle (SEA) flights

Horizon Air, SkyWest Airlines fly nonstop from Tri Cities Airport to Seattle-Tacoma International Airport, with about 53 flights a week in July 2026. The 172-mile flight takes about 1h 8m gate to gate.

From
PSC
Pasco
Tri Cities Airport
To
SEA
Seattle
Seattle-Tacoma International Airport
Distance
172 mi · 277 km
Flight time
1h 8m
Airlines
2
Seats filled
78%
Flights a week, July 2026
2,670 flights and 174,045 passengers in 12 months
SEASEAPSC
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying PSC to SEA

AirlineFlights a weekAircraftPassengers (12 months)Flight time
Horizon Air31Embraer E17561,1351h 4m
SkyWest Airlines21Embraer E17583,2901h 10m
Alaska AirlinesSeasonal or endedn/aBoeing 737-800, Boeing 737-900ER, Boeing 737 MAX 929,6201h 12m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

PSC to SEA flight schedule

12 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 6:00am and the last at 6:04pm. Times are local and can change; check with the airline before you book.

FlightDepartsArrivesDays flown in August 2026On time (12 months)
AS 3218Alaska Airlines · operated by SkyWest Airlines6:00am7:20am1392%
AS 2165Alaska Airlines · operated by Horizon Air6:15am7:20am1896%
DL 3972Delta Air Lines · operated by SkyWest Airlines6:15am7:36am3193%
AS 2153Alaska Airlines · operated by Horizon Air8:04am9:08am1385%
AS 2171Alaska Airlines · operated by Horizon Air10:33am11:38am1862%
AS 3140Alaska Airlines · operated by SkyWest Airlines10:49am12:03pm1377%
DL 3992Delta Air Lines · operated by SkyWest Airlines12:30pm1:50pm3184%
AS 2306Alaska Airlines · operated by Horizon Air12:56pm2:02pm1851%
AS 2179Alaska Airlines · operated by Horizon Air1:51pm2:55pm1369%
DL 3891Delta Air Lines · operated by SkyWest Airlines3:24pm4:37pm3191%
AS 3378Alaska Airlines · operated by SkyWest Airlines5:17pm6:32pm1392%
AS 2366Alaska Airlines · operated by Horizon Air6:04pm7:10pm1876%

Is PSC to SEA on time?

From September 2025 to August 2026, 86% of 2,663 flights arrived within 15 minutes of schedule and 1% were cancelled. Flights leaving around 5am were the most punctual (92%), those around 6pm the least (73%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (48%).

AirlineFlightsOn timeAverage delayCancelled
Alaska Airlines1,54883%11 min1.6%
Delta Air Lines1,11590%11 min0.3%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departureFlightsOn time, relativeOn time
5am to 6am300
92%
6am to 7am429
92%
8am to 9am264
91%
10am to 11am105
64%
11am to 12pm60
81%
12pm to 1pm284
77%
1pm to 2pm349
87%
2pm to 3pm61
89%
3pm to 4pm165
89%
4pm to 5pm56
86%
5pm to 6pm291
89%
6pm to 7pm144
73%
7pm to 8pm97
84%

Flights by month

MonthFlightsFlights, relativePassengers
August 2025254
14,046
September 2025227
14,885
October 2025229
15,400
November 2025207
15,430
December 2025236
17,775
January 2026204
14,822
February 2026180
12,325
March 2026199
13,643
April 2026209
12,545
May 2026269
15,658
June 2026222
13,626
July 2026235
14,065

Related

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.