Seattle (SEA) to Portland (PDX) flights

SkyWest Airlines, Horizon Air, Alaska Airlines fly nonstop from Seattle-Tacoma International Airport to Portland International Airport, with about 136 flights a week in July 2026. The 129-mile flight takes about 58m gate to gate.

From

SEA

Seattle

Seattle-Tacoma International Airport

PDX

Portland

Portland International Airport

Distance: 129 mi · 208 km
Flight time: 58m
Airlines: 3
Seats filled: 76%

Flights a week, July 2026

6,586 flights and 469,794 passengers in 12 months

Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying SEA to PDX

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
SkyWest Airlines	76	Embraer E175, Bombardier CRJ700	189,527	1h 1m
Horizon Air	40	Embraer E175	109,881	53m
Alaska Airlines	21	Boeing 737-800, Boeing 737-900ER, Boeing 737 MAX 9	148,180	56m
Delta Air LinesSeasonal or ended	n/a	Airbus A220-100, Boeing 737-800, Airbus A220-300	20,279	56m
American AirlinesSeasonal or ended	n/a	Airbus A321, Boeing 737-800, Boeing 737 MAX 8	1,927	56m

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

SEA to PDX flight schedule

32 flight numbers flew this route in August 2026, 8 of them almost daily. The first usually leaves at 6:42am and the last at 11:26pm. Times are local and can change; check with the airline before you book.

Flight	Departs	Arrives	Days flown in August 2026	On time (12 months)
AS 2432Alaska Airlines · operated by Horizon Air	6:42am	7:37am	18	99%
AS 453Alaska Airlines	7:08am	8:11am	13	92%
DL 3953Delta Air Lines · operated by SkyWest Airlines	7:25am	8:36am	31	93%
AS 2049Alaska Airlines · operated by Horizon Air	8:35am	9:33am	13	31%
AS 3132Alaska Airlines · operated by SkyWest Airlines	8:45am	9:49am	18	81%
DL 3818Delta Air Lines · operated by SkyWest Airlines	9:35am	10:42am	31	88%
AS 3145Alaska Airlines · operated by SkyWest Airlines	10:04am	11:13am	11	91%
AS 3090Alaska Airlines · operated by SkyWest Airlines	10:14am	11:21am	18	96%
DL 3802Delta Air Lines · operated by SkyWest Airlines	10:40am	11:45am	31	85%
AS 488Alaska Airlines	11:59am	1:10pm	13	85%
AS 2181Alaska Airlines · operated by Horizon Air	12:05pm	1:06pm	18	50%
DL 4062Delta Air Lines · operated by SkyWest Airlines	1:33pm	2:45pm	31	85%
AS 2028Alaska Airlines · operated by Horizon Air	1:36pm	2:32pm	13	79%
AS 3204Alaska Airlines · operated by SkyWest Airlines	1:45pm	2:48pm	18	77%
AS 441Alaska Airlines	3:50pm	4:49pm	13	46%
AS 686Alaska Airlines	3:55pm	4:55pm	18	67%
DL 3918Delta Air Lines · operated by SkyWest Airlines	4:06pm	5:14pm	31	84%
AS 2325Alaska Airlines · operated by Horizon Air	5:40pm	6:37pm	13	77%
AS 2302Alaska Airlines · operated by Horizon Air	5:59pm	6:56pm	17	67%
DL 3923Delta Air Lines · operated by SkyWest Airlines	6:35pm	7:44pm	31	81%
AS 434Alaska Airlines	6:51pm	7:50pm	13	92%
AS 2372Alaska Airlines · operated by Horizon Air	6:59pm	7:54pm	17	79%
AS 2125Alaska Airlines · operated by Horizon Air	7:51pm	8:47pm	13	62%
AS 2387Alaska Airlines · operated by Horizon Air	8:25pm	9:22pm	18	83%
AS 1867Alaska Airlines	8:59pm	10:01pm	13	77%
DL 3913Delta Air Lines · operated by SkyWest Airlines	8:59pm	10:02pm	31	81%
AS 498Alaska Airlines	9:28pm	10:25pm	18	72%
AS 2421Alaska Airlines · operated by Horizon Air	9:59pm	10:58pm	11	82%
AS 1457Alaska Airlines	10:29pm	11:30pm	18	65%
DL 4472Delta Air Lines · operated by SkyWest Airlines	10:50pm	11:56pm	26	68%
AS 2231Alaska Airlines · operated by Horizon Air	10:59pm	11:55pm	13	92%
AS 2377Alaska Airlines · operated by Horizon Air	11:26pm	12:22am	12	84%

Is SEA to PDX on time?

From September 2025 to August 2026, 82% of 6,524 flights arrived within 15 minutes of schedule and 0.7% were cancelled. Flights leaving around 7am were the most punctual (94%), those around 10pm the least (71%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (48%).

Airline	Flights	On time	Average delay	Cancelled
Alaska Airlines	3,869	80%	10 min	1%
Delta Air Lines	2,655	85%	9 min	0.3%

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 departure	Flights	On time
7am to 8am	513	94%
8am to 9am	321	82%
9am to 10am	532	88%
10am to 11am	243	86%
11am to 12pm	418	84%
12pm to 1pm	270	72%
1pm to 2pm	410	82%
3pm to 4pm	471	76%
4pm to 5pm	269	80%
5pm to 6pm	434	82%
6pm to 7pm	386	84%
7pm to 8pm	391	76%
8pm to 9pm	389	80%
9pm to 10pm	460	80%
10pm to 11pm	365	71%
11pm to 12am	358	81%

Flights by month

Month	Flights	Passengers
August 2025	641	46,635
September 2025	582	41,810
October 2025	576	41,946
November 2025	536	41,121
December 2025	509	37,905
January 2026	492	35,586
February 2026	441	33,405
March 2026	526	38,582
April 2026	550	36,126
May 2026	564	36,834
June 2026	569	38,224
July 2026	602	41,937

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