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Flights from Seattle to Ontario – Direct & connecting routes

Non-stop airlines Connecting flights Show map Price search

SEA to ONT flights and routes map SEA to ONT – All flight route options from Seattle Tacoma International, Washington, USA to Ontario International Airport, California, USA. These flights are operated by 8 different airlines. Fly non-stop or choose from 8 different connecting flights. The shortest flight time is 2 hours and 39 minutes. See the full flight schedule and time table, including departure times, airlines and stopover details to find the best option for you.

From
To
USA SEA Seattle Tacoma Seattle, WA, USA
USA ONT Ontario Airport, CA, USA
SEA
Seattle Tacoma
USASeattle, WA, USA
Ontario Airport
USAOntario, CA, USA
ONT
3 direct routes found »
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14 routes with 1 stop found »
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Non-stop route options:

Duration

Alaska Airlines
Non-stop with Alaska Airlines. 4-5 flights per day.

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2h 39m

Alaska Airlines
Non-stop with Alaska Airlines.
2h 39m
4-5 flights per day.
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Frontier Airlines
Non-stop with Frontier Airlines. 1 flight per day.

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2h 40m

Frontier Airlines
Non-stop with Frontier Airlines.
2h 40m
1 flight per day.
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Delta Air Lines
Non-stop with Delta Air Lines. 4 flights per day.

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2h 51m

Delta Air Lines
Non-stop with Delta Air Lines.
2h 51m
4 flights per day.
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1 stop route options with the same airline:

Duration

Via Sacramento SMF
1 stop with Southwest Airlines. 1-3 flights per day.

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4h 38m

Via Sacramento SMF
1 stop with Southwest Airlines.
4h 38m
1-3 flights per day.
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Via Oakland OAK
1 stop with Southwest Airlines. 0-2 flights per day.

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4h 50m

Via Oakland OAK
1 stop with Southwest Airlines.
4h 50m
0-2 flights per day.
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Via San Jose SJC
1 stop with Southwest Airlines. 0-2 flights per day.

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4h 50m

Via San Jose SJC
1 stop with Southwest Airlines.
4h 50m
0-2 flights per day.
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Via Las Vegas LAS
1 stop with Southwest Airlines. 1-3 flights per day.

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5h 13m

Via Las Vegas LAS
1 stop with Southwest Airlines.
5h 13m
1-3 flights per day.
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Via San Francisco SFO
1 stop with United Airlines. 3-4 flights per day.

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5h 14m

Via San Francisco SFO
1 stop with United Airlines.
5h 14m
3-4 flights per day.
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Via Portland PDX
1 stop with Alaska Airlines. 5 flights per day.

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5h 33m

Via Portland PDX
1 stop with Alaska Airlines.
5h 33m
5 flights per day.
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Via Phoenix PHX
1 stop with Southwest Airlines. 0-2 flights per day.

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5h 38m

Via Phoenix PHX
1 stop with Southwest Airlines.
5h 38m
0-2 flights per day.
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Via Las Vegas LAS
1 stop with Frontier Airlines. 0-1 flights per day.

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5h 40m

Via Las Vegas LAS
1 stop with Frontier Airlines.
5h 40m
0-1 flights per day.
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Via Salt Lake City SLC
1 stop with Delta Air Lines. 5 flights per day.

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5h 57m

Via Salt Lake City SLC
1 stop with Delta Air Lines.
5h 57m
5 flights per day.
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Via Phoenix PHX
1 stop with American Airlines. 3 flights per day.

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6h 15m

Via Phoenix PHX
1 stop with American Airlines.
6h 15m
3 flights per day.
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1 stop route options with codeshare or different airlines:

Duration

Via Portland PDX With Alaska Airlines & Hawaiian Airlines 5 flights per day.
CODESHARE

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5h 33m

Via Portland PDX
5h 33m
With Alaska Airlines & Hawaiian Airlines 5 flights per day.
CODESHARE
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Via Salt Lake City SLC With Alaska Airlines & Delta Air Lines 0-2 flights per day.

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5h 58m

Via Salt Lake City SLC
5h 58m
With Alaska Airlines & Delta Air Lines 0-2 flights per day.
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Via San Francisco SFO With Alaska Airlines & United Airlines 2-4 flights per day.

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6h 07m

Via San Francisco SFO
6h 07m
With Alaska Airlines & United Airlines 2-4 flights per day.
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Via Phoenix PHX With Alaska Airlines & American Airlines 2 flights per day.

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6h 28m

Via Phoenix PHX
6h 28m
With Alaska Airlines & American Airlines 2 flights per day.
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Find the best prices on hotels and car rental near Ontario Airport

We got great deals on hotels and car rentals near the airport.

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Seattle to Ontario flights

There are over 11 airlines and as many as 403 flights every week to this destination. You can fly non-stop to Ontario (ONT) from Seattle (SEA) with Alaska Airlines, Frontier Airlines or Delta Air Lines but if a stopover option suits you better you can choose to fly via Sacramento, San Jose or any other of the 8 alternatives with connectiing airports.

Seattle to Ontario with Alaska Airlines

You can fly non-stop every weekday with flights departing from 7:00 am to 9:00 pm. You also have the option to do a transit flight via Portland. Alaska Airlines is a member of the air alliance OneWorld.

With Southwest Airlines

Distance & flight times: Seattle Airport to Ontario International Airport

The shortest flight time between SEA and ONT is 2 hours and 39 minutes.

ViaTotal flight timeLayover timeDistance
Direct2h 39m-962 miles (1548 km)
SMF Sacramento4h 38m2h 30m1000 miles (1609 km)
SJC San Jose4h 50m45m1035 miles (1665 km)
OAK Oakland4h 50m50m1038 miles (1670 km)
PDX Portland5h 33m2h 20m973 miles (1566 km)
LAS Las Vegas5h 40m1h 55m1069 miles (1720 km)
SLC Salt Lake City5h 58m2h 33m1252 miles (2014 km)
SFO San Francisco6h 7m1h 34m1047 miles (1685 km)
PHX Phoenix6h 15m49m1439 miles (2315 km)
The flight times and layover times in the table above are approximate and may vary depending on flight number, aircraft, airline, weather, and time of day.SEA-ONT flight routesSeattle to Ontario flight routes illustrated on a map.
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Seattle - Ontario route map and flight paths
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You can fly non-stop from Seattle (SEA) to Ontario (ONT) with Alaska Airlines, Frontier Airlines or Delta Air Lines. The flight takes approximately 2 hours and 39 minutes. If you travel with a connecting flight instead, for example via Sacramento, the total flight time will be 4 hours and 38 minutes.

If you're interested in direct flights, Alaska Airlines, Frontier Airlines or Delta Air Lines is available. For flights with stopovers, Southwest Airlines, Alaska Airlines, Frontier Airlines, Delta Air Lines, United Airlines or American Airlines is also an option.

The flight time between Seattle Tacoma (SEA) and Ontario International Airport (ONT) is approximately 2 hours and 39 minutes. The distance between the two airports is 1439 miles (or 2315 kilometers).

Yes, you can fly non-stop to ONT from SEA with Alaska Airlines, Frontier Airlines or Delta Air Lines.

A codeshare agreement means that cooperating airlines are able to sell seats on each other’s flights. This means that you are able to travel to more destinations than your airline of choice normally offers. Codeshare flights are also beneficial because of the seamless transits you can get with connecting flights from the same airline. The downside of choosing a codeshare flight can be that you in some cases can’t upgrade codeshare flights or use elite benefits.

A connecting or transit flight means that you reach your final destination through two or more flights – in other words a non-direct flight. You will change to a new aircraft after your first flight, this may include moving to another terminal at the airport aswell. The time required to transfer passengers and luggage between flights is called Minimum Connecting Time (MCT) and are always taken into account here on Flightroutes.com.

If you bought your whole flight on a single ticket, the airline will book you on the next available connecting flight.

With connecting flights, checked in luggage is most commonly forwarded to your final destination when buying a single ticket for both flights.

If you miss your connecting flight due to circumstances outside your control such as your first flight being delayed, you should turn to your airline who will provide you with a seat on the next available flight. This is usually done free of charge, and only applies if you purchased your trip as one ticket. If the next connecting flight is the following day, the airline usually provides accommodation and meals.
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