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Cheap flights from Denver to Ontario (DEN - ONT) from $39

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
DEN — ONT
Apr 30 — May 71
From?
To?
Tue 4/30
Tue 5/7
1 adult, Economy
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The best prices from Denver Intl to Ontario are usually found in January or February, booked 49 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Denver to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 25, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$238

One-way from

$39
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 37% potential price drop
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From Denver Intl to Ontario
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One-way flight from Denver Intl to Ontario
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What is the cheapest day to fly round-trip from Denver to Ontario?

Monday is generally a great day to depart. Flying on this day could help you save up to 74%.

How far in advance should I book a flight from Denver to Ontario?

To save on the cost of your flight from Denver to Ontario, book at least 42 days before your planned departure. Booking around this time can save you about 80% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $206 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $376.

What is the cheapest month to fly from Denver to Ontario?

January is one of the best times of the year to fly to Ontario from Denver. Prices for January average $214 per person but you can even find prices for as low as $56. The most expensive prices can be found in the month of June. Opting for a January flight can save you 30% on your journey compared to booking in June

When is the cheapest time to fly from Denver to Ontario (DEN - ONT)?

One of the essential ways to save on airfare from Denver to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 22% on airfare.

Cheap Frontier flights from Denver to Ontario

Explore cheap flight options specifically provided by Frontier for the route between Denver and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Find some of the cheapest Frontier flights traveling from Denver to Ontario. Come back soon if you're not finding the exact deal you're looking for.
Wed 5/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$58
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/147:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$59
Wed 5/85:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 5/117:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/25$60
Sat 5/1810:37 pmDEN - ONT
Nonstop2h 22mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$61
Tue 5/75:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 5/712:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$62
Tue 5/145:01 amDEN - ONT
Nonstop2h 25mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$66
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$67
Tue 5/1410:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/282:25 pmONT - DEN
Nonstop2h 26mFrontier
Deal found 4/24$68
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/2412:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/23$69

  • One of the most popular airlines traveling from Denver to Ontario is Frontier. Flights from Frontier traveling this route typically cost $300.90 RT. This price is typically 19% cheaper than other airlines that offer Denver to Ontario flights. When booking this route, the cheapest RT price found was $119. Denver Intl Airport is the most common Denver airport to take off from when flying to Ontario. Ontario Airport is the most popular arrival airport in Ontario. When flying from Denver to Ontario, Frontier flights are 6% more popular than any other airline flying that same route.

Cheap Delta flights from Denver to Ontario

Explore cheap flight options specifically provided by Delta for the route between Denver and Ontario. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Denver to Ontario. Deals are refreshing constantly so come back soon for more options.
Wed 6/58:45 amDEN - ONT
1 stop4h 28mDelta
Tue 6/115:00 pmONT - DEN
1 stop4h 54mDelta
Deal found 4/24$217
Wed 5/112:54 pmDEN - ONT
1 stop4h 44mDelta
Tue 7/25:00 pmONT - DEN
1 stop4h 54mDelta
Deal found 4/24$268
Wed 5/18:51 amDEN - ONT
1 stop4h 21mDelta
Thu 6/275:00 pmONT - DEN
1 stop4h 54mDelta
Deal found 4/24$303

  • One of the most popular airlines traveling from Denver to Ontario is Delta. Flights from Delta traveling this route typically cost $145.65 RT. This price is typically 150% cheaper than other airlines that offer Denver to Ontario flights. When booking this route, the cheapest RT price found was $42. Denver Intl Airport is the most common Denver airport to take off from when flying to Ontario. Ontario Airport is the most popular arrival airport in Ontario. When flying from Denver to Ontario, Delta flights are -10% more popular than any other airline flying that same route.

Cheap Denver to Ontario flights in April & May 2024

Find cheap flight options from Denver to Ontario specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Prices were last updated on April 25, 2024.
These are some of the best deals we've found on flights to Ontario in 2024 at this time. For more flight deals, be sure to check back very soon.
Wed 5/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$58
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/147:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$59
Wed 5/85:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 5/117:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/25$60
Sat 5/1810:37 pmDEN - ONT
Nonstop2h 22mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$61
Tue 5/75:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 5/712:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$62
Tue 5/145:01 amDEN - ONT
Nonstop2h 25mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$66
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$67
Tue 5/1410:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/282:25 pmONT - DEN
Nonstop2h 26mFrontier
Deal found 4/24$68
Tue 5/710:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1012:55 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$69

Denver to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Denver and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
These are some of the best deals we've found on flights to Ontario in 2024 at this time. For more flight deals, be sure to check back very soon.
Wed 5/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$58
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/147:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$59
Wed 5/85:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 5/117:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/25$60
Sat 5/1810:37 pmDEN - ONT
Nonstop2h 22mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$61
Tue 5/75:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 5/712:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$62
Tue 5/145:01 amDEN - ONT
Nonstop2h 25mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$66
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$67
Tue 5/1410:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/282:25 pmONT - DEN
Nonstop2h 26mFrontier
Deal found 4/24$68
Tue 5/710:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1012:55 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$69

Non-stop flights to Ontario from Denver

Discover non-stop flight options from Denver to Ontario. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
If you're seeking options on non-stop flights from Denver to Ontario, check out these fares. Select from other flights from Denver to Ontario by using the search form above.
Wed 5/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$58
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/147:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$59
Wed 5/85:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 5/117:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/25$60
Sat 5/1810:37 pmDEN - ONT
Nonstop2h 22mFrontier
Mon 5/2012:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$61
Tue 5/75:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 5/712:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$62
Tue 5/145:01 amDEN - ONT
Nonstop2h 25mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$66
Sat 5/1110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$67
Tue 5/1410:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/282:25 pmONT - DEN
Nonstop2h 26mFrontier
Deal found 4/24$68
Tue 5/710:35 pmDEN - ONT
Nonstop2h 24mFrontier
Fri 5/1012:55 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$69

Denver to Ontario flights leaving soon

Find last-minute flight options from Denver to Ontario for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Users seeking a last-minute flight from Denver to Ontario should consider booking one of these fares. It's wise to confirm all flight details are correct before booking.
Wed 5/15:01 amDEN - ONT
Nonstop2h 25mFrontier
Fri 5/1012:55 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$100
Wed 5/110:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 5/77:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$109
Thu 5/210:32 pmDEN - ONT
Nonstop2h 24mFrontier
Sat 5/117:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$110
Thu 5/25:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 5/77:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$117
Sat 5/47:59 amDEN - ONT
1 stop6h 22mFrontier
Sun 5/57:31 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/25$118
Wed 5/110:59 pmDEN - ONT
1 stop9h 09mFrontier
Fri 5/1012:55 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$119
Thu 5/25:11 amDEN - ONT
1 stop12h 49mFrontier
Tue 5/77:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 4/24$126
Wed 5/15:17 pmDEN - ONT
1 stop5h 40mFrontier
Mon 5/612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 4/24$128
Thu 5/25:01 amDEN - ONT
Nonstop2h 25mFrontier
Thu 6/2712:59 amONT - DEN
Nonstop2h 21mFrontier
Deal found 4/24$129

One-way flights to Ontario from Denver

Search for one-way flight options from Denver to Ontario. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
Users traveling one-way from Denver to Ontario can select one of these great deals. Users in need of a round-trip flight from Denver to Ontario instead should update the search form at the top of page.
Tue 5/75:01 amDEN - ONT
Nonstop2h 25mFrontier
Deal found 4/24$39
Fri 5/1710:37 pmDEN - ONT
Nonstop2h 22mFrontier
Deal found 4/23$44
Wed 5/2212:35 pmDEN - ONT
1 stop4h 30mFrontier
Deal found 4/24$45
Thu 5/3011:00 amDEN - ONT
Nonstop2h 25mFrontier
Deal found 4/24$49
Thu 6/139:41 amDEN - ONT
Nonstop2h 24mFrontier
Deal found 4/24$50
Tue 5/2111:08 pmDEN - ONT
1 stop10h 56mFrontier
Deal found 4/24$51
Tue 5/712:33 pmDEN - ONT
1 stop5h 31mFrontier
Deal found 4/25$53
Mon 5/276:41 amDEN - ONT
Nonstop2h 24mFrontier
Deal found 4/25$54
Thu 5/1610:37 pmDEN - ONT
Nonstop2h 22mFrontier
Deal found 4/25$55

Find flights from Denver to Ontario within your budget

Customize your flight search to find flights from Denver to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$58 - $217

Route

Depart

Return

Price

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Wed 5/15

Nonstop2h 25m

Ontario

Mon 5/20

Nonstop2h 21m

$58

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sat 5/11

Nonstop2h 24m

Ontario

Tue 5/14

Nonstop2h 20m

$59

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Wed 5/8

Nonstop2h 25m

Ontario

Sat 5/11

Nonstop2h 20m

$60

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sat 5/18

Nonstop2h 22m

Ontario

Mon 5/20

Nonstop2h 21m

$61

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Tue 5/7

Nonstop2h 25m

Ontario

Tue 5/7

Nonstop2h 24m

$62

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Tue 5/14

Nonstop2h 25m

Ontario

Fri 5/17

Nonstop2h 21m

$66

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sat 5/11

Nonstop2h 24m

Ontario

Fri 5/17

Nonstop2h 21m

$67

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sun 6/2

Nonstop2h 22m

Ontario

Wed 6/5

1 stop8h 07m

$154

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Wed 6/5

1 stop4h 28m

Ontario

Tue 6/11

1 stop4h 54m

$217

Flights are sorted by cheapest first

Deals found on 4/24

When is the best time to book a flight from Denver to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Ontario. Price data was last updated on January 28, 2024.
The price you pay for your flight from Denver to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 49 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from Denver to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Denver to Ontario. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Denver to Ontario flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Ontario by month

Plan your trip from Denver to Ontario by taking into account the cheapest months to travel. The average price of a one-way flight from Denver to Ontario is currently $49 while a round-trip flight costs $89. Price data was last updated on April 21, 2024.

Currently, October is the cheapest month in which you can book a flight from Denver to Ontario (average of $237). Flying from Denver to Ontario in June is currently the most expensive (average of $346). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$270

February

$287

March

$281

April

$258

May

$271

June

$346

July

$335

August

$287

September

$258

October

$237

November

$268

December

$271

Temperature and rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average temperature and rainfall totals by month.

LAX

Temperature

57.2 - 73.4 °F

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated April 25, 2024.
To help decide which airline to fly from Denver to Ontario, see what other customers have to say about Frontier, Delta and United Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,180 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Alaska Airlines
8.1
Very good
9,114 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Delta
8.1
Very good
10,975 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

United Airlines
7.4
Good
11,234 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

American Airlines
7.3
Good
14,898 reviews
Southwest
8.2
Very good
6,180 reviews
Check prices

Comfort

8.1

Boarding

8.3

Crew

8.7

Overall

8.2

Entertainment

7.8

Food

7.4

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Related info for your journey

Find useful and relevant information for your journey from Denver to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to Ontario?

    You will need to book a flight from Denver Intl to Ontario if you want to fly from Denver to Ontario. At least 5 different airlines have flights from Denver Intl (DEN) to Ontario (ONT) on a regular basis. There are 9 flights to Ontario from the Denver airport per day. If you manage to book one that is nonstop, then you can expect the flight time from DEN to ONT to be around 2h 18m.

  • Can I find flights from Denver to Ontario for under $100 on Cheapflights?

    Yes, there are multiple flights from Denver to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $58, but on average you can expect to pay $70.

  • Are there nonstop flights from Denver to Ontario for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Denver to Ontario under $100. A good price for a nonstop flight from Denver to Ontario is less than $71.

  • Are there last-minute flights available from Denver to Ontario for under $100?

    There are currently 20+ open flights from Denver to Ontario within the next 7 days for less than $100.

  • What days are nonstop flights available from Denver to Ontario?

    Days when nonstop flights are available for this flight are: Saturday.

  • How popular is this Denver to Ontario flight route?

    Flights from Denver Intl to Ontario have been viewed 44 times in the past calendar month.

  • How many flights depart from Denver to Ontario on average per day?

    On average 1 flight departs from Denver to Ontario per day.
    Evening (6pm - Midnight) - 100% of flight departures

  • How long is the flight from Denver to Ontario?

    There are many flights that can get you from Denver to Ontario in 2h 25m. Fly via Frontier to get the fastest option. Airlines will cover a distance of 822 mi. All flights are typically nonstop.

  • What is the cheapest airline to fly from Denver to Ontario round-trip?

    According to our current data, Frontier ($58), offers the cheapest pricing from Denver to Ontario. Frontier is priced at 61% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular airlines that fly from Denver to Ontario?

    Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Denver to Ontario.

  • What are the most reliable airlines from Denver to Ontario?

    Before booking your flight to Ontario from Denver, check out the most reliable airlines to get you to your destination on time: Frontier (82%), Air Canada (77%), United Airlines( 77%).

  • What are the cheapest flights from Denver to Ontario?

    The cheapest flight price from Denver to Ontario is $24. On average you can expect to pay $106. The most popular route, (Denver Intl - Ontario), can usually be booked for $74.

  • What does DEN to ONT mean?

    Denver Intl Airport is DEN and Ontario Airport is ONT. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from Denver to Ontario that include extra baggage allowance?

    The amount of baggage you can bring on your Denver to Ontario flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Denver to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter Denver to Ontario flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Denver to Ontario that include hotel bookings?

    Yes. In addition to deals on Denver to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Ontario.

  • Can I find deals for business class flights from Denver to Ontario?

    Yes. Cheapflights offers flight deals from Denver to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Denver to Ontario that allow pets onboard?

    Many airlines flying from Denver to Ontario offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Denver to Ontario?

    Yes, you can often find last-minute deals on Denver to Ontario flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Denver to Ontario flight deals updated?

    The Denver to Ontario flight deals you see on this page were last updated on 4/25.

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Alternative routes for Denver to Ontario
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from Denver to Ontario

Discover the top 5 airlines that operate flights from Denver to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,068,701 searches. Data last updated April 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$42Average$146FlexibilityNo cancel feeOn-time62%
Search Frontier flights
Spirit AirlinesCheapest$81Average$173FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
DeltaCheapest$113Average$281FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$119Average$301FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$196Average$356FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Search flights from Denver to Ontario by cabin class

Find flights from Denver to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
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Hourly flight availability from Denver to Ontario

Find hourly flight availability from Denver to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2024.
8%of flight departuresEarly morningMidnight to 6 am
39%of flight departuresMorning6 am to noon
14%of flight departuresAfternoonNoon to 6 pm
39%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Denver to Ontario

Explore weekly flight availability from Denver to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 25, 2024.
Sunday11daily flights
Monday10daily flights
Tuesday9daily flights
Wednesday9daily flights
Thursday9daily flights
Friday9daily flights
Saturday8daily flights

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How does Cheapflights help users find flights from Denver to Ontario?

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Why should you use Cheapflights to find cheap flight tickets from Denver to Ontario?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Denver to Ontario.

Can Cheapflights find flights from Denver to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Denver to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Denver to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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