Flights from Ontario Flights to Denver

Direct flights from Ontario to Denver

Did you mean flights from Denver to Ontario?

Last updated on: 04-01-2026

Ontario

United States

ONT

Ontario International Airport

Denver

United States

DEN

Denver International Airport

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Flight schedule

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Distance

817 miles · (1,315 km)

Flight time

2 hours and 22 minutes

Airlines

Frontier Airlines
Southwest Airlines
United Airlines

Alliances

Oneworld
SkyTeam
Star Alliance

Classes

Economy
Premium Economy
Business Class
First Class

Aircrafts

Airbus A320-100/200
Airbus A320neo
Airbus A321-100/200
Airbus A321neo
Boeing 737 MAX 8
Boeing 737 MAX 9
Boeing 737-800
Boeing 737-800 (winglets)
Boeing 737-900
Boeing 757

Ontario to Denver Flight Schedule

Scan through all non-stop flights from Ontario to Denver. The full flight schedule below gives an overview of all non-stop flights from ONT to DEN, which includes the daily timetable of every operating airline for the upcoming 12 months.

Note: for airline-specific flight schedules, please scroll further down.

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Best time to visit Denver

What is the best time to visit Denver?

☀️ Hot Mediterranean

The Mediterranean regions near Denver are known for their warm, arid summers, where temperatures often go beyond 30°C (86°F). In some inland spots, the heat can climb even higher, sometimes reaching 40°C (104°F) or more. The winters are pleasantly mild, accompanied by some rainfall. This lovely climate, paired with breathtaking landscapes and bright, sunny days attract visitors from around the globe.

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Nov

Dec

Denver is a wonderful place to visit all year long, but spring (March-May) and fall (September-November) are the best seasons to visit. The weather is pleasantly warm during these times, especially since the summers can be quite hot in those regions.

Denver

DEN

Airlines flying from Ontario to Denver

Airline-specific flight schedules from Ontario to Denver

In total there are 3 airlines operating nonstop flights from Ontario ONT to Denver DEN. 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 ONT DEN flight schedule.

Frontier Airlines (F9)

Southwest Airlines (WN)

United Airlines (UA)

Frontier Airlines flight schedulefrom Ontario to Denver

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Southwest Airlines flight schedulefrom Ontario to Denver

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United Airlines flight schedulefrom Ontario to Denver

United Airlines is a member of Star Alliance

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Ontario to Denver Flights

Flights from ONT to DEN are operated 48 times a week, with an average of 7 flights per day. Departure times vary between 00:59 - 18:30. The earliest flight departs at 00:59, the last flight departs at 18:30. 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 Ontario to Denver takes 2 hours and 22 minutes. The flight distance between Ontario and Denver is 817 miles (or 1,315 km).

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Frequently asked questions - FAQ

How many airports are there in Denver?

There are 2 airports in Denver: Denver International Airport (DEN) and Centennial Airport (APA).

How many flights per week are there from ONT to DEN?

There are 48 flights per week flying from Ontario to Denver (as of April 2026).

How long does it take to fly from Ontario to Denver?

2 hours and 22 minutes is the average flight time from Ontario to Denver.

How far is Denver from Ontario?

The distance from Ontario to Denver is 817 miles (1,315 kilometers).

What airlines fly nonstop from ONT airport to DEN airport?

Frontier Airlines, Southwest Airlines and United Airlines are flying nonstop from Ontario to Denver.

What alliances have direct flights from Ontario to Denver?

Star Alliance is currently the only alliance flying nonstop from Ontario to Denver.

What classes are available from Ontario to Denver?

You can fly non-stop in Economy and Business Class.

What aircraft types fly from Ontario to Denver?

Aircraft types that fly from Ontario to Denver:

Airbus A320-100/200
Airbus A320neo
Airbus A321-100/200
Airbus A321neo
Boeing 737 MAX 8
Boeing 737 MAX 9
Boeing 737-800
Boeing 737-800 (winglets)
Boeing 737-900
Boeing 757

What is the earliest flight departing from Ontario to Denver?

The earliest flight departs at 00:59 from Ontario and arrives at 04:15 at Denver.

What is the latest flight available from Ontario to Denver?

The latest flight departs at 18:30 from Ontario and arrives at 21:51 at Denver.

Popular flights from Ontario, United States

Ontario to Phoenix

Ontario to Denver

Ontario to Las Vegas

Ontario to Dallas-Fort Worth

Ontario to Sacramento

Ontario to Seattle / Tacoma

Ontario to Oakland, East Bay

Ontario to San Jose

Ontario to San Francisco

Ontario to Salt Lake City

Ontario to Portland

Ontario to Guadalajara

Ontario to Atlanta

Ontario to Taipei

Show all flights from Ontario Show all flights to Denver

Popular routes operated by Frontier Airlines

Denver to Las Vegas

Denver to Phoenix

Denver to Dallas-Fort Worth

Denver to Orlando

Denver to Salt Lake City

Denver to Houston

Denver to Washington

Show all Frontier Airlines flights

Popular routes operated by Southwest Airlines

Denver to Phoenix

Denver to Las Vegas

Denver to Sacramento

Denver to Dallas

Denver to Oakland, East Bay

Denver to Austin

Denver to Houston

Show all Southwest Airlines flights

Popular routes operated by United Airlines

Denver to San Francisco

Denver to Houston

Denver to Chicago

Denver to Aspen

Denver to Colorado Springs

Denver to Newark

Denver to Phoenix

Show all United Airlines flights

Popular flights from Ontario via Denver

Ontario to Dublin

Ontario to Frankfurt

Ontario to Istanbul

Ontario to London Heathrow

Ontario to Munich

Ontario to Paris

Ontario to Reykjavik (Keflavik)

Ontario to Rome (Fiumicino)

Ontario to Zürich

Ontario to Allentown

Ontario to Abilene

Ontario to Albuquerque

Ontario to Arcata / Eureka

Ontario to Alliance

Ontario to Albany

Ontario to Alamosa

Ontario to Amarillo

Ontario to Anchorage

Ontario to Aspen

Ontario to Appleton

Ontario to Watertown

Ontario to Asheville

Ontario to Hartford

Ontario to Scottsbluff

Ontario to Bangor

Ontario to Birmingham

Ontario to Billings

Ontario to Bismarck

Ontario to Boston

Ontario to Butte

Ontario to Burlington

Ontario to Belize City

Ontario to Bozeman

Ontario to Chadron

Ontario to Cortez

Ontario to Chattanooga

Ontario to Charleston

Ontario to Cedar Rapids

Ontario to Cleveland

Ontario to Columbus

Ontario to Carlsbad

Ontario to Moab

Ontario to Cody

Ontario to Colorado Springs

Ontario to Columbia

Ontario to Casper

Ontario to Corpus Christi

Ontario to Cancún

Ontario to Chihuahua

Ontario to Cincinnati

Ontario to Clovis

Ontario to Cheyenne

Ontario to Cozumel

Ontario to Dayton

Ontario to Washington

Ontario to Dodge City

Ontario to Dickinson

Ontario to Durango

Ontario to Des Moines

Ontario to Detroit

Ontario to Devils Lake

Ontario to Kearney

Ontario to Panama City

Ontario to Vail / Eagle

Ontario to El Paso

Ontario to Eugene

Ontario to Fairbanks

Ontario to Fargo

Ontario to Kalispell

Ontario to Fort Lauderdale

Ontario to Farmington

Ontario to Fort Dodge

Ontario to Sioux Falls

Ontario to Gillette

Ontario to Grand Cayman

Ontario to Spokane

Ontario to Grand Junction

Ontario to Grand Rapids

Ontario to Greenville / Spartanburg

Ontario to Great Falls

Ontario to Gunnison

Ontario to Hayden

Ontario to Helena

Ontario to Hobbs

Ontario to Harlingen

Ontario to Huntsville

Ontario to Hays

Ontario to Washington

Ontario to Wichita

Ontario to Idaho Falls

Ontario to Wilmington

Ontario to Indianapolis

Ontario to Jackson

Ontario to Jacksonville

Ontario to Joplin

Ontario to Jamestown

Ontario to Kailua-Kona

Ontario to Laramie

Ontario to Lubbock

Ontario to North Platte

Ontario to Liberal

Ontario to Lexington

Ontario to New York City

Ontario to Lihue, Kauai

Ontario to Liberia

Ontario to Little Rock

Ontario to Lincoln

Ontario to Midland

Ontario to Montego Bay

Ontario to Kansas City

Ontario to McCook

Ontario to Orlando

Ontario to Memphis

Ontario to Mexico City

Ontario to Medford

Ontario to Milwaukee

Ontario to Moline

Ontario to Minot

Ontario to Madison

Ontario to Missoula

Ontario to Minneapolis

Ontario to New Orleans

Ontario to Montrose

Ontario to Monterrey

Ontario to Myrtle Beach

Ontario to Nassau

Ontario to Tokyo

Ontario to Kahului

Ontario to Oklahoma City

Ontario to Omaha

Ontario to Norfolk

Ontario to North Bend

Ontario to West Palm Beach

Ontario to Peoria

Ontario to Pierre

Ontario to Pittsburgh

Ontario to Pensacola

Ontario to Pasco

Ontario to Panama City

Ontario to Pueblo

Ontario to Punta Cana

Ontario to Providence

Ontario to Puerto Vallarta

Ontario to Portland

Ontario to Querétaro

Ontario to Rapid City

Ontario to Redmond / Bend

Ontario to Raleigh / Durham

Ontario to Richmond

Ontario to Riverton

Ontario to Rock Springs

Ontario to Roswell

Ontario to Fort Myers

Ontario to Roatan

Ontario to Santa Fe

Ontario to San Antonio

Ontario to Savannah

Ontario to Louisville

Ontario to Springfield / Branson

Ontario to Sheridan

Ontario to Sarasota / Bradenton

Ontario to St. Louis

Ontario to Hailey / Sun Valley

Ontario to Sioux City

Ontario to Syracuse

Ontario to Telluride

Ontario to Tampa

Ontario to Taos

Ontario to Tulsa

Ontario to Traverse City

Ontario to Knoxville

Ontario to Vernal

Ontario to Destin / Fort Walton Beach

Ontario to West Yellowstone

Ontario to Fayetteville

Ontario to Edmonton

Ontario to Regina

Ontario to Montreal

Ontario to Vancouver

Ontario to Winnipeg

Ontario to Calgary

Ontario to Toronto

Ontario to San José

Ontario to San Juan

Ontario to Salina

Ontario to Shreveport

Ontario to Philadelphia

Ontario to Miami

Ontario to Buffalo

Ontario to Williston

Ontario to Newark

Non-stop flights from ONT to DEN

817 miles (1,315 km) · 2h 22m

Round trip

1 passenger

Economy

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Depart
Arrive
Airline
Flight no
Aircraft
Classes

00:59
04:15
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320neo
Y
W
J
F

00:59
04:15
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320neo
Y
W
J
F

00:59
04:15
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A321neo
Y
W
J
F

00:59
04:15
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320neo
Y
W
J
F

05:00
08:22
United Airlines

Star Alliance
UA 2446
United Airlines
Boeing 737-800
Y
W
J
F

05:10
08:32
United Airlines

Star Alliance
UA 2446
United Airlines
Boeing 737-800
Y
W
J
F

05:50
09:00
Southwest Airlines
WN 4129
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

06:20
09:43
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320neo
Y
W
J
F

06:20
09:43
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320-100/200
Y
W
J
F

06:20
09:43
Frontier Airlines
F9 1500
Frontier Airlines
Airbus A320neo
Y
W
J
F

06:20
09:30
Southwest Airlines
WN 1666
Southwest Airlines
Boeing 757
Y
W
J
F

06:25
09:40
Southwest Airlines
WN 4129
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F

06:25
09:40
Southwest Airlines
WN 4129
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

06:25
09:35
Southwest Airlines
WN 1666
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

06:55
10:05
Southwest Airlines
WN 113
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

08:00
11:10
Southwest Airlines
WN 113
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F

08:10
11:20
Southwest Airlines
WN 113
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

08:25
11:40
Southwest Airlines
WN 4132
Southwest Airlines
Boeing 757
Y
W
J
F

09:20
12:30
Southwest Airlines
WN 787
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

09:30
12:40
Southwest Airlines
WN 113
Southwest Airlines
Boeing 757
Y
W
J
F

10:25
13:35
Southwest Airlines
WN 3612
Southwest Airlines
Boeing 757
Y
W
J
F

10:40
13:55
Southwest Airlines
WN 1666
Southwest Airlines
Boeing 757
Y
W
J
F

11:35
14:50
Southwest Airlines
WN 4671
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

11:40
14:55
Southwest Airlines
WN 3303
Southwest Airlines
Boeing 757
Y
W
J
F

12:50
16:00
Southwest Airlines
WN 3303
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

13:10
16:20
Southwest Airlines
WN 4671
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

13:20
16:40
Southwest Airlines
WN 3303
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

13:34
16:56
United Airlines

Star Alliance
UA 1263
United Airlines
Airbus A320-100/200
Y
W
J
F

13:34
16:53
United Airlines

Star Alliance
UA 1263
United Airlines
Airbus A320-100/200
Y
W
J
F

13:34
16:56
United Airlines

Star Alliance
UA 1263
United Airlines
Airbus A320-100/200
Y
W
J
F

13:38
17:00
United Airlines

Star Alliance
UA 1263
United Airlines
Boeing 737 MAX 8
Y
W
J
F

13:40
16:55
Southwest Airlines
WN 542
Southwest Airlines
Boeing 757
Y
W
J
F

13:40
17:02
United Airlines

Star Alliance
UA 1263
United Airlines
Boeing 737-800
Y
W
J
F

13:43
17:03
United Airlines

Star Alliance
UA 1263
United Airlines
Boeing 737-900
Y
W
J
F

13:55
17:10
Southwest Airlines
WN 3303
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

14:35
17:45
Southwest Airlines
WN 787
Southwest Airlines
Boeing 757
Y
W
J
F

14:50
18:00
Southwest Airlines
WN 787
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F

14:50
18:00
Southwest Airlines
WN 787
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

15:00
18:15
Southwest Airlines
WN 3653
Southwest Airlines
Boeing 757
Y
W
J
F

15:00
18:15
Southwest Airlines
WN 3653
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F

15:05
18:15
Southwest Airlines
WN 787
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F

17:12
20:34
Frontier Airlines
F9 2908
Frontier Airlines
Airbus A321neo
Y
W
J
F

17:33
20:58
Frontier Airlines
F9 2908
Frontier Airlines
Airbus A321-100/200
Y
W
J
F

17:33
20:58
Frontier Airlines
F9 2908
Frontier Airlines
Airbus A321neo
Y
W
J
F

17:33
20:58
Frontier Airlines
F9 2908
Frontier Airlines
Airbus A321neo
Y
W
J
F

17:43
21:08
Frontier Airlines
F9 2908
Frontier Airlines
Airbus A321-100/200
Y
W
J
F