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$103+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ONT
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
1 adult, Economy
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Cheap 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 September 14, 2025.

Round-trip from

$148
(Gotogate)

One-way from

$103
(Trip.com)

Popular in

October

Cheapest in

February

Average price

$362
From Detroit (DTT) to Ontario
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One-way flight from Detroit (DTT) to Ontario
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Highest demand for flights based on searches. 6% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 14, 2025.

This Mytrip deal was found by Cheapflights users on 9/13. 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.
Mon 10/66:10 amDTW - ONT
1 stop19h 03mFrontier
Sat 10/117:04 amONT - DTW
1 stop14h 55mFrontier
Deal found 9/13$148
This Booking.com deal was found by Cheapflights users on 9/13. 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.
Thu 10/96:00 amDTW - ONT
1 stop6h 35mFrontier
Mon 10/136:53 amONT - DTW
1 stop15h 06mFrontier
Deal found 9/13$149
This Booking.com deal was found by Cheapflights users on 9/11. 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.
Sat 10/117:55 amDTW - ONT
1 stop18h 55mFrontier
Sat 10/188:34 amONT - DTW
1 stop7h 59mFrontier
Deal found 9/11$154
This Frontier deal was found by Cheapflights users on 9/13. 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 10/211:54 amDTW - ONT
1 stop11h 00mFrontier
Sat 10/48:59 pmONT - DTW
1 stop11h 05mFrontier
Deal found 9/13$158
This Frontier deal was found by Cheapflights users on 9/11. 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 10/211:54 amDTW - ONT
1 stop11h 00mFrontier
Sat 10/118:34 amONT - DTW
1 stop7h 59mFrontier
Deal found 9/11$162
This Booking.com deal was found by Cheapflights users on 9/14. 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.
Sat 9/278:00 amDTW - ONT
1 stop26h 23mFrontier
Tue 9/308:59 pmONT - DTW
1 stop24h 47mFrontier
Deal found 9/14$164
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Sun 9/216:10 amDTW - ONT
1 stop28h 43mFrontier
Fri 9/268:59 pmONT - DTW
1 stop23h 59mFrontier
Deal found 9/12$172
This Booking.com deal was found by Cheapflights users on 9/13. 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.
Sat 9/208:00 amDTW - ONT
1 stop26h 23mFrontier
Sat 9/278:59 pmONT - DTW
1 stop24h 47mFrontier
Deal found 9/13$173
This Booking.com deal was found by Cheapflights users on 9/12. 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.
Tue 9/238:00 amDTW - ONT
1 stop14h 54mFrontier
Fri 9/268:59 pmONT - DTW
1 stop23h 59mFrontier
Deal found 9/12$174
This Booking.com deal was found by Cheapflights users on 9/12. 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.
Thu 10/96:00 amDTW - ONT
1 stop6h 35mFrontier
Sat 10/117:04 amONT - DTW
1 stop14h 55mFrontier
Deal found 9/12$180
This Booking.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/246:00 amDTW - ONT
1 stop20h 50mFrontier
Sat 10/257:04 amONT - DTW
1 stop14h 55mFrontier
Deal found 9/13$185
This Gotogate deal was found by Cheapflights users on 9/12. 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.
Fri 10/36:10 amDTW - ONT
1 stop16h 44mFrontier
Thu 10/96:53 amONT - DTW
1 stop15h 06mFrontier
Deal found 9/12$187

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 September 14, 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

Thu 9/18

6:10 am-7:54 pm

1 stop16h 44m

Ontario

Sun 9/21

8:59 pm-12:46 am

1 stop24h 47m

$271

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Sat 11/15

4:32 pm-10:55 pm

1 stop9h 23m

Ontario

Wed 11/19

1:20 pm-11:59 pm

1 stop7h 39m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Tue 10/28

2:10 pm-6:36 pm

1 stop7h 26m

Ontario

Tue 11/4

1:33 pm-10:17 pm

1 stop5h 44m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 11/12

4:32 pm-10:55 pm

1 stop9h 23m

Ontario

Wed 11/19

1:20 pm-11:59 pm

1 stop7h 39m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 11/12

8:03 am-12:18 pm

1 stop7h 15m

Ontario

Mon 11/17

10:25 pm-9:26 am

1 stop8h 01m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Tue 11/11

5:45 am-10:40 am

1 stop7h 55m

Ontario

Wed 11/19

11:46 am-10:25 pm

1 stop7h 39m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Tue 11/11

5:45 am-10:40 am

1 stop7h 55m

Ontario

Tue 11/18

11:46 am-10:25 pm

1 stop7h 39m

$363

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Wed 10/22

6:00 am-12:51 pm

2 stops9h 51m

Ontario

Sat 10/25

1:15 pm-10:22 pm

1 stop6h 07m

$368

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Sat 10/25

6:00 am-12:51 pm

2 stops9h 51m

Ontario

Wed 10/29

7:00 am-4:45 pm

1 stop6h 45m

$368

DetroitOntario

DTW - ONT

DTWONT

Detroit Metropolitan Wayne County

Sat 10/25

5:45 am-10:26 am

1 stop7h 41m

Ontario

Sat 10/25

5:50 pm-6:28 am

1 stop9h 38m

$372

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 22 results
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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, August is the cheapest month in which you can book a flight from Detroit to Ontario (average of $246). Flying from Detroit to Ontario in March is currently the most expensive (average of $328). 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 September 14, 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 37% 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 75% 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 $401.

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 September 14, 2025.
Read through reviews of airlines operating flights from Detroit to Ontario, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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
8.0
Very good
7,956 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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
3,173 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

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 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 26m. Fly via Frontier, 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 Spirit Airlines, from $177, and American Airlines, from $329. Users have found that Frontier is 60% cheaper than the other options available to this destination.

  • 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, August is the cheapest month in which you can book a flight from Detroit to Ontario (average of $246). Flying from Detroit to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Detroit to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Detroit to Ontario

Discover the top 6 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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$155Average$287FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$177Average$204FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$329Average$511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$329Average$455FlexibilityNo cancel feeOn-time71%
DeltaCheapest$344Average$430FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$390Average$495FlexibilityNo cancel feeOn-time63%

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