HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$62+ Cheap flights from Detroit to Ontario (DTT - ONT)

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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Detroit to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Detroit to Ontario

Cheapest flights from Detroit to Ontario
Explore the most affordable flight options available from Detroit to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This CheapOair deal was found by Cheapflights users on 12/16. 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 12/2510:01 pmDTW - ONT
1 stop28h 58mFrontier
Thu 1/16:45 amONT - DTW
1 stop25h 40mFrontier
Deal found 12/16$259
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Tue 12/2310:01 pmDTW - ONT
1 stop28h 58mFrontier
Fri 1/236:20 amONT - DTW
1 stop6h 59mFrontier
Deal found 12/16$269
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/3112:20 pmDTW - ONT
1 stop14h 39mFrontier
Sat 1/177:15 amONT - DTW
1 stop25h 09mFrontier
Deal found 12/17$277
This CheapOair deal was found by Cheapflights users on 12/16. 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.
Tue 12/2310:01 pmDTW - ONT
1 stop28h 58mFrontier
Sun 12/286:00 amONT - DTW
1 stop21h 54mFrontier
Deal found 12/16$309
This Mytrip deal was found by Cheapflights users on 12/15. 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.
Thu 12/257:50 amDTW - ONT
1 stop16h 27mFrontier
Mon 12/296:00 pmONT - DTW
1 stop9h 54mFrontier
Deal found 12/15$313
This Gotogate deal was found by Cheapflights users on 12/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2310:01 pmDTW - ONT
1 stop28h 58mFrontier
Wed 12/316:00 amONT - DTW
1 stop21h 54mFrontier
Deal found 12/17$328
This CheapOair deal was found by Cheapflights users on 12/17. 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.
Tue 12/2310:01 pmDTW - ONT
1 stop28h 58mFrontier
Fri 12/266:45 amONT - DTW
1 stop25h 40mFrontier
Deal found 12/17$329
This Booking.com deal was found by Cheapflights users on 12/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:20 pmDTW - ONT
1 stop14h 39mFrontier
Sat 1/36:45 amONT - DTW
1 stop25h 40mFrontier
Deal found 12/17$332
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:50 amDTW - ONT
1 stop12h 25mFrontier
Mon 12/296:00 pmONT - DTW
1 stop9h 54mFrontier
Deal found 12/16$333
This CheapOair deal was found by Cheapflights users on 12/15. 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 12/2412:20 pmDTW - ONT
1 stop14h 39mFrontier
Fri 12/266:45 amONT - DTW
1 stop25h 40mFrontier
Deal found 12/15$334
This Frontier deal was found by Cheapflights users on 12/16. 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 12/247:50 amDTW - ONT
1 stop12h 25mFrontier
Thu 12/256:07 pmONT - DTW
1 stop9h 47mFrontier
Deal found 12/16$337

Find flight deals from Detroit to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Detroit (DTT) 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$166
(Kiwi.com)

One-way from

$62
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$406
Provider with most accurate pricing for Detroit (DTT)-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Detroit (DTT)-Ontario flights.
Search Deals
From Detroit (DTT) to Ontario
Search Deals
One-way flight from Detroit (DTT) to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Detroit 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 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Detroit to Ontario that are best for you.

Fly from

Detroit

Fly to

Ontario

Route

Depart

Return

Price

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 3/18

4:40 pm-10:37 pm

1 stop8h 57m

Ontario

Tue 3/24

6:55 pm-3:38 pm

1 stop17h 43m

$305

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Thu 1/15

8:00 am-12:16 pm

1 stop7h 16m

Ontario

Sun 1/25

7:30 am-6:30 am

1 stop20h 00m

$330

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Sat 1/10

2:07 pm-8:58 pm

2 stops9h 51m

Ontario

Sat 1/31

5:05 am-6:58 pm

2 stops10h 53m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Thu 1/1

5:19 am-10:00 am

1 stop7h 41m

Ontario

Thu 1/8

12:41 pm-8:10 am

2 stops16h 29m

$386

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 1/14

9:00 am-5:43 pm

2 stops11h 43m

Ontario

Wed 1/28

1:24 pm-10:30 pm

1 stop6h 06m

$406

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Fri 3/20

10:30 am-3:45 pm

1 stop8h 15m

Ontario

Sun 3/22

11:55 pm-9:50 am

1 stop6h 55m

$419

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Thu 1/15

8:00 am-12:16 pm

1 stop7h 16m

Ontario

Sun 1/18

7:30 am-6:30 am

1 stop20h 00m

$419

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 1/14

9:00 am-12:47 pm

1 stop6h 47m

Ontario

Sun 1/18

1:24 pm-10:30 pm

1 stop6h 06m

$420

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Tue 1/27

2:19 pm-10:53 pm

2 stops11h 34m

Ontario

Fri 2/6

1:24 pm-10:30 pm

1 stop6h 06m

$422

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Sat 2/7

9:00 am-12:47 pm

1 stop6h 47m

Ontario

Sun 2/15

1:50 pm-12:32 am

1 stop7h 42m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 22 results
1
2
3

Compare providers for flights from Detroit to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Detroit to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Detroit-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Detroit-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Detroit-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Detroit-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Detroit-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Detroit to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Detroit 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 Detroit to Ontario

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

Currently, February is the cheapest month in which you can book a flight from Detroit to Ontario (average of $103). Flying from Detroit to Ontario in June is currently the most expensive (average of $159). 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 DTT to ONT?

Find hourly flight availability from Detroit 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 December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Detroit to Ontario in the evening. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight in the afternoon.

How much does it cost to fly round-trip from Detroit to Ontario?

What’s the top layover airport for flights from Detroit to Ontario?

Share of 1-stop round-trip flights from Detroit to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.

Denver (DEN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Detroit to Ontario on Cheapflights.

What’s the cheapest layover airport for flights from Detroit to Ontario?

Average round-trip fare for 1-stop flights from Detroit to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $149.

What’s the fastest layover option from Detroit to Ontario?

Shortest average travel time for 1-stop one-way flights from Detroit to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Las Vegas (LAS) have the shortest average one-way travel time for 1-stop routes: 6h 25m.

Which airport typically offers the quickest layover for flights from Detroit to Ontario?

Average layover duration for 1-stop one-way flights from Detroit to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 0h 58m.

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 December 18, 2025.
Read through reviews of airlines operating flights from Detroit to Ontario, such as Delta, American Airlines, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
11,054 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
5.8
Fair
3,080 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

  • How long is the flight from Detroit to Ontario?

    There are many flights that can get you from Detroit to Ontario in 7h 16m. Fly via Alaska Airlines, Delta, or United Airlines to get the fastest option. There are 1929 mi between Detroit and Ontario. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Detroit to Ontario round-trip?

    Cheapflights users have booked flights from Detroit to Ontario round-trip from $155. Other airlines that can offer you cheap pricing are United Airlines, from $266, and American Airlines, from $329. Users have found that Frontier is 57% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Detroit to Ontario one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Detroit to Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Detroit 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.

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

    Currently, February is the cheapest month in which you can book a flight from Detroit to Ontario (average of $103). Flying from Detroit to Ontario in June is currently the most expensive (average of $159). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Detroit to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Las Vegas flights
O'Hare Intl to Los Angeles flights
O'Hare Intl to San Francisco flights
Detroit to Las Vegas flights
Midway to Los Angeles flights
Midway to Las Vegas flights
Detroit to Los Angeles flights
O'Hare Intl to Santa Ana flights
O'Hare Intl to Ontario flights
O'Hare Intl to San Diego flights
O'Hare Intl to Palm Springs flights
Detroit to San Francisco flights
O'Hare Intl to Burbank flights
Midway to San Francisco flights
Detroit to San Diego flights
Detroit to Ontario flights
Midway to Santa Ana flights
O'Hare Intl to Reno flights
Midway to San Diego flights
O'Hare Intl to Sacramento flights
Detroit to Santa Ana flights
Rockford to Las Vegas flights
Midway to Ontario flights
Detroit to Burbank flights
Grand Rapids to Las Vegas flights
O'Hare Intl to San Jose flights
Midway to Palm Springs flights
Midway to Burbank flights
Grand Rapids to Los Angeles flights
O'Hare Intl to Long Beach flights
Flint to Las Vegas flights
O'Hare Intl to Oakland flights
Detroit to Palm Springs flights
Detroit to Oakland flights
South Bend to Los Angeles flights
Midway to San Jose flights
Grand Rapids to Ontario flights
Midway to Reno flights
Detroit to San Jose flights
South Bend to Las Vegas flights
Grand Rapids to San Diego flights
Grand Rapids to San Francisco flights
Flint to San Diego flights
Traverse City to Las Vegas flights
Midway to Sacramento flights
O'Hare Intl to Santa Barbara flights
Grand Rapids to Santa Ana flights
Grand Rapids to San Jose flights
Detroit to Reno flights
Lansing to Las Vegas flights

Top 5 airlines flying from Detroit to Ontario

Discover the top 5 airlines that operate flights from Detroit 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 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$155Average$316FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$329Average$511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$329Average$421FlexibilityNo cancel feeOn-time71%
DeltaCheapest$344Average$430FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$386Average$476FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.