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Aurora

$68+ Cheap flights from Ontario (ONT) to Aurora, CO

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DEN
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Aurora are usually found in January or February, booked 88 days in advance, depart on a Friday or Thursday and return on a Wednesday

Find flight deals from Ontario to Aurora

Cheapest flights from Ontario to Aurora
Explore the most affordable flight options available from Ontario to Aurora. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

This CheapOair deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amONT - DEN
Nonstop2h 21mFrontier
Wed 12/3110:32 pmDEN - ONT
Nonstop2h 27mFrontier
Deal found 11/3$91
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:58 amONT - DEN
Nonstop2h 21mFrontier
Thu 12/49:42 amDEN - ONT
Nonstop2h 27mFrontier
Deal found 11/4$93
This Frontier deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:01 pmONT - DEN
Nonstop2h 21mFrontier
Wed 1/79:11 pmDEN - ONT
Nonstop2h 29mFrontier
Deal found 11/2$95
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2012:58 amONT - DEN
Nonstop2h 22mFrontier
Fri 11/285:25 pmDEN - ONT
Nonstop2h 28mFrontier
Deal found 11/4$98
This CheapOair deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:04 pmONT - DEN
Nonstop2h 20mFrontier
Tue 12/96:30 amDEN - ONT
1 stop15h 47mFrontier
Deal found 11/4$99
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:45 amONT - DEN
Nonstop2h 21mFrontier
Wed 1/79:11 pmDEN - ONT
Nonstop2h 29mFrontier
Deal found 11/3$100
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:15 amONT - DEN
1 stop7h 38mFrontier
Wed 1/79:11 pmDEN - ONT
Nonstop2h 29mFrontier
Deal found 11/3$102
This Mytrip deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/188:45 amONT - DEN
Nonstop2h 22mFrontier
Thu 11/2010:29 pmDEN - ONT
Nonstop2h 28mFrontier
Deal found 11/4$103
This CheapOair deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:30 amONT - DEN
1 stop16h 13mFrontier
Sun 11/2310:00 amDEN - ONT
Nonstop2h 28mFrontier
Deal found 11/4$104
This Mytrip deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:20 pmONT - DEN
Nonstop2h 20mFrontier
Wed 12/106:30 amDEN - ONT
1 stop15h 47mFrontier
Deal found 11/4$105
This Frontier deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:20 pmONT - DEN
Nonstop2h 20mFrontier
Mon 12/812:58 pmDEN - ONT
Nonstop2h 27mFrontier
Deal found 11/3$107
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/63:20 pmONT - DEN
Nonstop2h 20mFrontier
Sun 12/71:40 pmDEN - ONT
Nonstop2h 26mFrontier
Deal found 11/4$108

Cheap flight deals from Ontario to Aurora

Keep the following information in mind while searching for Ontario to Aurora flight deals. Data was last updated November 4, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$91
(CheapOair)

One-way from

$68
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$169
Provider with most accurate pricing for Los Angeles-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Denver Intl flights.
Search Deals
From Ontario to Aurora
Search Deals
One-way flight from Ontario to Aurora
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Aurora 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 2,558,603 searches. Data last updated November 4, 2025.
Use the filters below to find and compare flights from Ontario to Aurora that are best for you.

Fly from

Ontario

Fly to

Aurora

Route

Depart

Return

Price

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Wed 1/14

8:55 am-12:10 pm

Nonstop2h 15m

Denver Intl

Tue 1/20

1:10 pm-2:35 pm

Nonstop2h 25m

$117

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Wed 1/14

5:05 am-8:24 am

Nonstop2h 19m

Denver Intl

Tue 1/20

7:34 pm-8:58 pm

Nonstop2h 24m

$117

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Fri 12/12

2:15 pm-5:25 pm

Nonstop2h 10m

Denver Intl

Tue 1/13

1:10 pm-2:35 pm

Nonstop2h 25m

$157

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Wed 12/3

2:50 pm-6:00 pm

Nonstop2h 10m

Denver Intl

Tue 12/9

1:10 pm-2:30 pm

Nonstop2h 20m

$157

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Tue 12/16

6:00 am-2:46 pm

1 stop7h 46m

Denver Intl

Wed 1/7

7:00 am-3:08 pm

1 stop9h 08m

$173

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Tue 1/20

7:00 am-1:35 pm

1 stop5h 35m

Denver Intl

Tue 1/27

8:35 am-2:40 pm

2 stops7h 05m

$182

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 12/4

5:05 am-8:20 am

Nonstop2h 15m

Denver Intl

Thu 12/4

7:20 pm-8:42 pm

Nonstop2h 22m

$197

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 12/4

5:05 am-8:20 am

Nonstop2h 15m

Denver Intl

Sun 12/7

7:20 pm-8:42 pm

Nonstop2h 22m

$197

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Sun 12/14

6:00 am-11:09 am

1 stop4h 09m

Denver Intl

Tue 1/6

4:10 pm-10:38 pm

1 stop7h 28m

$207

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Wed 12/3

12:40 pm-11:21 pm

1 stop9h 41m

Denver Intl

Fri 12/12

6:22 pm-10:47 pm

2 stops29h 25m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 21 results
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2
3

Best time to book a flight from Ontario to Aurora

Have a flexible travel schedule? Discover the best time to fly to Aurora from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Aurora

How far ahead should I book a flight from Ontario to Aurora?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Aurora. Price data was last updated on October 31, 2025.

The best time to book flights from Ontario to Aurora is 88 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Ontario to Aurora?

Currently, March is the cheapest month in which you can book a flight from Ontario to Aurora (average of $36). Flying from Ontario to Aurora in September is currently the most expensive (average of $76). 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.

What is the cheapest time of day to fly from ONT to 9UR?

Find hourly flight availability from Ontario to Aurora. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.

It’s optimal to fly from Ontario to Aurora in the evening. By choosing this option you can save up to 47% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Ontario to Aurora?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Aurora. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to Aurora flight should consider departing on Saturday 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.

Weekly flight availability from Ontario to Aurora

Explore weekly flight availability from Ontario to Aurora. 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 November 4, 2025.

The most flights from ONT to 9UR are scheduled on a Sunday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Aurora

Get insights into the airlines that provide service to Aurora. 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 Aurora. Reviews last updated November 4, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Ontario to Aurora to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,237 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,002 reviews
Southwest
8.0
Very good
4,237 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,237 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,116 reviews
Southwest
8.0
Very good
4,237 reviews

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Aurora?

    If you book a flight to Aurora from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 6 flights from Ontario to Aurora per day from 4 different airlines.

  • How popular is this Ontario to Aurora flight route?

    The Ontario to Aurora flight path was viewed by 364 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ontario to Aurora?

    Southwest, United Airlines, and Alaska Airlines can get you from Ontario to Aurora in just under 2h 15m. Your travel time can differ by up to 5h 31m. Ontario and Aurora are separated by a distance of 817 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Before booking your flight to Aurora from Ontario, check out the most reliable airlines to get you to your destination on time: United Airlines (85%), Air Canada (81%), Southwest( 79%).

  • What are the cheapest flights from Ontario to Aurora?

    The cheapest flight price from Ontario to Aurora is $75. On average you can expect to pay $735. The most popular route, (Ontario - Denver Intl), can usually be booked for $58.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Ontario to Aurora?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Aurora (average of $36). Flying from Ontario to Aurora in September is currently the most expensive (average of $76). 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.

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Top 4 airlines flying from Ontario to Aurora

Discover the top 4 airlines that operate flights from Ontario to Aurora. 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 2,558,603 searches. Data last updated November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$141FlexibilityNo cancel feeOn-time62%
DeltaCheapest$109Average$265FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$118Average$312FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$133Average$348FlexibilityNo cancel feeOn-time69%

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