Delta
SkyTeam
Did you mean flights from Ontario to Seattle / Tacoma?
United States
Seattle–Tacoma International Airport
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United States
Ontario International Airport
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Scan through all non-stop flights from Seattle / Tacoma to Ontario. The full flight schedule below gives an overview of all non-stop flights from SEA to ONT, which includes the daily timetable of every operating airline for the upcoming 12 months.
Note: for airline-specific flight schedules, please scroll further down.
In Ontario, the summers are known for being warm, long, and dry, with temperatures typically reaching about 30°C (86°F). The area’s breathtaking scenery complements the sun-filled lifestyle, making it a popular destination for visitors all year round who are looking for relaxation, fun by the water, and the beauty of the outdoors.
Ontario is best explored from mid-spring to summer, specifically between April and September, as most rainfall occurs from October to February.
In total there are 3 airlines operating nonstop flights from Seattle / Tacoma SEA to Ontario ONT. This section gives an overview of the flight schedules and timetables of every airline with direct flights for this route.
Click an airline below to view their SEA ONT flight schedule.
Flights from SEA to ONT are operated 31 times a week, with an average of 4 flights per day. Departure times vary between 08:15 - 21:22. The earliest flight departs at 08:15, the last flight departs at 21:22. However, this depends on the date you are flying so please check with the full flight schedule above to see which departure times are available on your preferred date(s) of travel.
You can fly in Economy and Business Class. Premium Economy and First Class are not available on this route (at least not as a non-stop flight).
The fastest direct flight from Seattle / Tacoma to Ontario takes 2 hours and 44 minutes. The flight distance between Seattle / Tacoma and Ontario is 956 miles (or 1,539 km).
There is 1 airport in Ontario: Ontario International Airport (ONT).
There are 31 flights per week flying from Seattle / Tacoma to Ontario (as of May 2026).
2 hours and 44 minutes is the average flight time from Seattle / Tacoma to Ontario.
The distance from Seattle / Tacoma to Ontario is 956 miles (1,539 kilometers).
Alaska, Delta and Frontier Airlines are flying nonstop from Seattle / Tacoma to Ontario.
Oneworld and SkyTeam are flying nonstop from Seattle / Tacoma to Ontario.
You can fly non-stop in Economy and Business Class.
Aircraft types that fly from Seattle / Tacoma to Ontario:
The earliest flight departs at 08:15 from Seattle / Tacoma and arrives at 11:04 at Ontario.
The latest flight departs at 21:22 from Seattle / Tacoma and arrives at 23:58 at Ontario.
956 miles (1,539 km) · 2h 44m
08:25
11:12
Delta
SkyTeam
DL 4070
Delta
Embraer 175
Y
W
J
F
08:30
11:10
Alaska
Oneworld
AS 1364
Alaska
Boeing 737 MAX 9
Y
W
J
F
08:30
11:10
Alaska
Oneworld
AS 1364
Alaska
Boeing 737 MAX 9
Y
W
J
F
08:30
11:10
Alaska
Oneworld
AS 1364
Alaska
Boeing 737-900 (winglets)
Y
W
J
F
08:30
11:10
Alaska
Oneworld
AS 1364
Alaska
Boeing 737-800 (winglets)
Y
W
J
F
08:32
11:12
Alaska
Oneworld
AS 1364
Alaska
Boeing 737 MAX 9
Y
W
J
F
09:45
12:35
Delta
SkyTeam
DL 3840
Delta
Embraer 175
Y
W
J
F
11:51
14:35
Frontier Airlines
F9 2276
Frontier Airlines
Airbus A321neo
Y
W
J
F
11:51
14:35
Frontier Airlines
F9 2276
Frontier Airlines
Airbus A320neo
Y
W
J
F
12:30
15:09
Alaska
Oneworld
AS 625
Alaska
Boeing 737-900 (winglets)
Y
W
J
F
12:30
15:09
Alaska
Oneworld
AS 625
Alaska
Boeing 737 MAX 9
Y
W
J
F
14:30
17:05
Delta
SkyTeam
DL 4031
Delta
Embraer 175
Y
W
J
F
14:30
17:10
Delta
SkyTeam
DL 4031
Delta
Embraer 175
Y
W
J
F
14:30
17:10
Delta
SkyTeam
DL 4031
Delta
Embraer 175
Y
W
J
F
14:30
17:10
Delta
SkyTeam
DL 4031
Delta
Embraer 175
Y
W
J
F
16:10
18:47
Alaska
Oneworld
AS 592
Alaska
Boeing 737-900 (winglets)
Y
W
J
F
16:10
18:47
Alaska
Oneworld
AS 592
Alaska
Boeing 737 MAX 9
Y
W
J
F
16:10
18:47
Alaska
Oneworld
AS 592
Alaska
Boeing 737-900 (winglets)
Y
W
J
F
16:25
19:02
Alaska
Oneworld
AS 592
Alaska
Boeing 737-800 (winglets)
Y
W
J
F
16:25
19:02
Alaska
Oneworld
AS 592
Alaska
Boeing 737 MAX 9
Y
W
J
F
16:40
19:17
Alaska
Oneworld
AS 592
Alaska
Boeing 737-900 (winglets)
Y
W
J
F
19:50
22:34
Delta
SkyTeam
DL 3884
Delta
Embraer 175
Y
W
J
F
19:50
22:34
Delta
SkyTeam
DL 3884
Delta
Embraer 175
Y
W
J
F
19:50
22:34
Delta
SkyTeam
DL 3884
Delta
Embraer 175
Y
W
J
F
19:50
22:34
Delta
SkyTeam
DL 3884
Delta
Embraer 175
Y
W
J
F
21:22
23:58
Alaska
Oneworld
AS 489
Alaska
Boeing 737 MAX 9
Y
W
J
F
21:22
23:58
Alaska
Oneworld
AS 489
Alaska
Boeing 737 MAX 9
Y
W
J
F
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