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Flights from Ontario to Denver – Direct & connecting routes

Non-stop airlines Connecting flights Show map Price search

ONT to DEN flights and routes map ONT to DEN – All flight route options from Ontario International Airport, California, USA to Denver International, Colorado, USA. These flights are operated by 6 different airlines. Fly non-stop or choose from 10 different connecting flights. The shortest flight time is 2 hours and 10 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 ONT Ontario Airport Ontario, CA, USA
USA DEN Denver , CO, USA
ONT
Ontario Airport
USAOntario, CA, USA
Denver
USADenver, CO, USA
DEN
3 direct routes found »
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16 routes with 1 stop found »
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Non-stop route options:

Duration

Southwest Airlines
Non-stop with Southwest Airlines. 3-4 flights per day.

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2h 10m

Southwest Airlines
Non-stop with Southwest Airlines.
2h 10m
3-4 flights per day.
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United Airlines
Non-stop with United Airlines. 3 flights per day.

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2h 16m

United Airlines
Non-stop with United Airlines.
2h 16m
3 flights per day.
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Frontier Airlines
Non-stop with Frontier Airlines. 2 flights per day.

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2h 22m

Frontier Airlines
Non-stop with Frontier Airlines.
2h 22m
2 flights per day.
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1 stop route options with the same airline:

Duration

Via Phoenix PHX
1 stop with American Airlines. 3 flights per day.

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4h 06m

Via Phoenix PHX
1 stop with American Airlines.
4h 06m
3 flights per day.
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Via Salt Lake City SLC
1 stop with Delta Air Lines. 2-4 flights per day.

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4h 57m

Via Salt Lake City SLC
1 stop with Delta Air Lines.
4h 57m
2-4 flights per day.
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Via Las Vegas LAS
1 stop with Frontier Airlines. 0-2 flights per day.

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5h 00m

Via Las Vegas LAS
1 stop with Frontier Airlines.
5h 00m
0-2 flights per day.
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Via San Francisco SFO
1 stop with United Airlines. 4-5 flights per day.

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5h 09m

Via San Francisco SFO
1 stop with United Airlines.
5h 09m
4-5 flights per day.
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Via Phoenix PHX
1 stop with Southwest Airlines. 2-4 flights per day.

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5h 10m

Via Phoenix PHX
1 stop with Southwest Airlines.
5h 10m
2-4 flights per day.
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Via Albuquerque ABQ
1 stop with Southwest Airlines. 0-1 flights per day.
Begins in 22/11

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5h 20m

Begins in 22/11
Via Albuquerque ABQ
1 stop with Southwest Airlines.
5h 20m
0-1 flights per day.
Begins in 22/11
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Via Las Vegas LAS
1 stop with Southwest Airlines. 2-5 flights per day.

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5h 30m

Via Las Vegas LAS
1 stop with Southwest Airlines.
5h 30m
2-5 flights per day.
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Via San Jose SJC
1 stop with Southwest Airlines. 1-3 flights per day.

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5h 58m

Via San Jose SJC
1 stop with Southwest Airlines.
5h 58m
1-3 flights per day.
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Via Sacramento SMF
1 stop with Southwest Airlines. 2-4 flights per day.

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6h 15m

Via Sacramento SMF
1 stop with Southwest Airlines.
6h 15m
2-4 flights per day.
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Via Oakland OAK
1 stop with Southwest Airlines. 2-4 flights per day.

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6h 18m

Via Oakland OAK
1 stop with Southwest Airlines.
6h 18m
2-4 flights per day.
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Via Salt Lake City SLC
1 stop with Southwest Airlines. 0-2 flights per day.

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6h 20m

Via Salt Lake City SLC
1 stop with Southwest Airlines.
6h 20m
0-2 flights per day.
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Via El Paso ELP
1 stop with Southwest Airlines.
Begins in 2/11

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6h 20m

Begins in 2/11
Via El Paso ELP
1 stop with Southwest Airlines.
6h 20m
Begins in 2/11
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Via Boise BOI
1 stop with Southwest Airlines.
Begins in 4/11

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7h 35m

Begins in 4/11
Via Boise BOI
1 stop with Southwest Airlines.
7h 35m
Begins in 4/11
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1 stop route options with codeshare or different airlines:

Duration

Via Phoenix PHX With American Airlines & United Airlines 2 flights per day.

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5h 12m

Via Phoenix PHX
5h 12m
With American Airlines & United Airlines 2 flights per day.
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Via Salt Lake City SLC With Delta Air Lines & United Airlines 2-3 flights per day.

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5h 25m

Via Salt Lake City SLC
5h 25m
With Delta Air Lines & United Airlines 2-3 flights per day.
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Via San Francisco SFO 1 stop with Emirates. 1-2 flights per day.
CODESHARE

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5h 46m

Via San Francisco SFO
5h 46m
1 stop with Emirates. 1-2 flights per day.
CODESHARE
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Ontario to Denver flights

There are over 13 airlines and as many as 346 flights every week to this destination. You can fly non-stop to Denver (DEN) from Ontario (ONT) with Frontier Airlines, United Airlines or Southwest Airlines but if a stopover option suits you better you can choose to fly via Phoenix, Salt Lake City or any other of the 10 alternatives with connectiing airports.

Ontario to Denver with Frontier Airlines

You can fly non-stop every weekday with flights departing between 10:00 am and 12 midnight. You also have the option to do a transit flight via Las Vegas.

With American Airlines

If you fly from Ontario with American Airlines you will do a stopover in Phoenix, PHX before reaching Denver. This flight trip will take 4 hours and 6 minutes and you can fly every weekday with departures from 5:00 am to 9:00 pm. American Airlines is a member of the air alliance OneWorld.

Distance & flight times: Ontario International Airport to Denver International

The shortest flight time between ONT and DEN is 2 hours and 21 minutes.

ViaTotal flight timeLayover timeDistance
Direct2h 21m-822 miles (1323 km)
PHX Phoenix4h 6m50m931 miles (1498 km)
SLC Salt Lake City4h 57m55m953 miles (1533 km)
LAS Las Vegas5h 0m1h 56m828 miles (1332 km)
SFO San Francisco5h 9m43m1334 miles (2146 km)
ABQ Albuquerque5h 20m55m984 miles (1583 km)
SJC San Jose5h 58m3h 0m1285 miles (2068 km)
SMF Sacramento6h 15m1h 45m1303 miles (2097 km)
OAK Oakland6h 18m55m1323 miles (2129 km)
ELP El Paso6h 20m1h 25m1239 miles (1994 km)
BOI Boise7h 35m2h 20m1315 miles (2116 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.ONT-DEN flight routesOntario to Denver flight routes illustrated on a map.
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Arriving at Denver International
Arriving at Denver International. Copyright: Denver International Airport
Ontario - Denver route map and flight paths
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You can fly non-stop from Ontario (ONT) to Denver (DEN) with Frontier Airlines, United Airlines or Southwest Airlines. The flight takes approximately 2 hours and 21 minutes. If you travel with a connecting flight instead, for example via Phoenix, the total flight time will be 4 hours and 6 minutes.

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

The flight time between Ontario Airport (ONT) and Denver International (DEN) is approximately 2 hours and 21 minutes. The distance between the two airports is 931 miles (or 1498 kilometers).

Yes, you can fly non-stop to DEN from ONT with Frontier Airlines, United Airlines or Southwest Airlines.

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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