Redmond (RDM) to Seattle (SEA) flights

SkyWest Airlines, Horizon Air fly nonstop from Roberts Field to Seattle-Tacoma International Airport, with about 55 flights a week in July 2026. The 228-mile flight takes about 1h 17m gate to gate.

From
RDM
Redmond
Roberts Field
To
SEA
Seattle
Seattle-Tacoma International Airport
Distance
228 mi · 367 km
Flight time
1h 17m
Airlines
2
Seats filled
73%
Flights a week, July 2026
2,702 flights and 177,608 passengers in 12 months
SEASEARDM
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying RDM to SEA

AirlineFlights a weekAircraftPassengers (12 months)Flight time
SkyWest Airlines35Embraer E17573,9901h 20m
Horizon Air21Embraer E17551,3131h 13m
Alaska AirlinesSeasonal or endedn/aBoeing 737-900ER, Boeing 737-800, Boeing 737 MAX 952,3051h 16m

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

RDM to SEA flight schedule

13 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 6:00am and the last at 7:36pm. Times are local and can change; check with the airline before you book.

FlightDepartsArrivesDays flown in August 2026On time (12 months)
AS 3026Alaska Airlines · operated by SkyWest Airlines6:00am7:14am1887%
AS 2267Alaska Airlines · operated by Horizon Air6:04am7:20am1385%
DL 4036Delta Air Lines · operated by SkyWest Airlines6:15am7:44am3189%
AS 2027Alaska Airlines · operated by Horizon Air7:15am8:28am1887%
AS 2019Alaska Airlines · operated by Horizon Air7:40am8:55am1385%
AS 2076Alaska Airlines · operated by Horizon Air9:44am10:57am1862%
AS 3063Alaska Airlines · operated by SkyWest Airlines10:09am11:26am1362%
AS 276Alaska Airlines1:31pm2:47pm1373%
AS 2400Alaska Airlines · operated by Horizon Air1:48pm2:59pm1865%
DL 3735Delta Air Lines · operated by SkyWest Airlines1:52pm3:21pm3188%
AS 2344Alaska Airlines · operated by Horizon Air5:24pm6:37pm1354%
AS 3124Alaska Airlines · operated by SkyWest Airlines5:49pm7:10pm1763%
DL 4141Delta Air Lines · operated by SkyWest Airlines7:36pm9:00pm3188%

Is RDM to SEA on time?

From September 2025 to August 2026, 83% of 2,727 flights arrived within 15 minutes of schedule and 1.9% were cancelled. Flights leaving around 6am were the most punctual (90%), those around 9am the least (70%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (44%).

AirlineFlightsOn timeAverage delayCancelled
Alaska Airlines1,66680%12 min2.1%
Delta Air Lines1,06188%9 min1.5%

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 6am227
89%
6am to 7am331
90%
7am to 8am285
86%
8am to 9am133
88%
9am to 10am199
70%
11am to 12pm265
88%
1pm to 2pm367
79%
3pm to 4pm109
78%
4pm to 5pm56
78%
5pm to 6pm271
77%
7pm to 8pm296
85%

Flights by month

MonthFlightsFlights, relativePassengers
August 2025270
19,688
September 2025264
18,326
October 2025240
15,745
November 2025211
13,699
December 2025225
14,350
January 2026194
13,044
February 2026173
11,521
March 2026210
14,009
April 2026202
11,495
May 2026230
14,359
June 2026239
15,731
July 2026244
15,641

Related

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