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$100+ Cheap flights from Ontario to Detroit (ONT - DTT)

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DTT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Ontario to Detroit

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Detroit (DTT). 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 16, 2025.

Round-trip from

$148
(CheapOair)

One-way from

$100
(Trip.com)

Popular in

November

Cheapest in

September

Average price

$279
From Ontario to Detroit (DTT)
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One-way flight from Ontario to Detroit (DTT)
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Highest demand for flights based on searches. 9% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% 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 Ontario to Detroit

Cheapest flights from Ontario to Detroit
Explore the most affordable flight options available from Ontario to Detroit. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:59 pmONT - DTW
1 stop23h 59mFrontier
Sat 10/117:55 amDTW - ONT
1 stop18h 55mFrontier
Deal found 9/14$148
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.
Thu 10/28:59 pmONT - DTW
1 stop24h 47mFrontier
Sun 10/56:10 amDTW - ONT
1 stop28h 43mFrontier
Deal found 9/14$149
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/287:15 pmONT - DTW
1 stop11h 32mFrontier
Thu 10/26:10 amDTW - ONT
1 stop28h 43mFrontier
Deal found 9/14$152
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.
Thu 10/307:39 amONT - DTW
1 stop7h 54mFrontier
Sun 11/29:05 pmDTW - ONT
1 stop17h 05mFrontier
Deal found 9/14$154
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:59 pmONT - DTW
1 stop10h 55mFrontier
Thu 10/96:00 amDTW - ONT
1 stop6h 35mFrontier
Deal found 9/15$158
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:15 pmONT - DTW
1 stop11h 32mFrontier
Thu 10/96:00 amDTW - ONT
1 stop6h 35mFrontier
Deal found 9/15$162
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:59 pmONT - DTW
1 stop24h 47mFrontier
Tue 9/308:00 amDTW - ONT
1 stop14h 54mFrontier
Deal found 9/13$172
This CheapOair deal was found by Cheapflights users on 9/15. 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.
Mon 10/206:53 amONT - DTW
1 stop15h 06mFrontier
Sun 10/266:00 amDTW - ONT
1 stop6h 35mFrontier
Deal found 9/15$179
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:53 amONT - DTW
1 stop15h 06mFrontier
Sat 10/117:55 amDTW - ONT
1 stop18h 55mFrontier
Deal found 9/14$186
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/612:05 pmONT - DTW
1 stop25h 14mFrontier
Thu 11/135:14 pmDTW - ONT
1 stop9h 36mFrontier
Deal found 9/16$187
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.
Thu 10/96:53 amONT - DTW
1 stop15h 06mFrontier
Mon 10/136:00 amDTW - ONT
1 stop20h 50mFrontier
Deal found 9/14$188

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Detroit 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 16, 2025.
Use the filters below to find and compare flights from Ontario to Detroit that are best for you.

Fly from

Ontario

Fly to

Detroit

Route

Depart

Return

Price

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Thu 10/9

1:15 pm-11:59 pm

1 stop7h 44m

Detroit Metropolitan Wayne County

Sat 10/11

8:00 am-12:14 pm

1 stop7h 14m

$363

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/8

11:48 am-10:28 pm

1 stop7h 40m

Detroit Metropolitan Wayne County

Wed 10/15

8:25 am-5:10 pm

1 stop11h 45m

$363

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/8

10:00 pm-9:25 am

1 stop8h 25m

Detroit Metropolitan Wayne County

Sat 10/11

8:00 am-12:14 pm

1 stop7h 14m

$363

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 12/13

7:05 am-4:48 pm

1 stop6h 43m

Detroit Metropolitan Wayne County

Tue 12/23

6:15 pm-10:59 pm

1 stop7h 44m

$392

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 12/13

1:20 pm-12:09 am

1 stop7h 49m

Detroit Metropolitan Wayne County

Tue 1/6

4:30 pm-10:52 pm

1 stop9h 22m

$392

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 2/4

10:30 pm-10:57 am

1 stop9h 27m

Detroit Metropolitan Wayne County

Mon 2/9

8:05 pm-11:52 pm

1 stop6h 47m

$392

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Mon 12/8

1:20 pm-12:09 am

1 stop7h 49m

Detroit Metropolitan Wayne County

Tue 12/23

6:15 pm-10:59 pm

1 stop7h 44m

$392

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 12/9

7:05 am-4:48 pm

1 stop6h 43m

Detroit Metropolitan Wayne County

Thu 12/11

8:09 pm-11:59 pm

1 stop6h 50m

$394

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 12/9

7:05 am-4:48 pm

1 stop6h 43m

Detroit Metropolitan Wayne County

Sat 12/13

8:03 am-12:22 pm

1 stop7h 19m

$394

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 10/11

1:15 pm-11:59 pm

1 stop7h 44m

Detroit Metropolitan Wayne County

Tue 10/14

8:01 pm-5:10 pm

1 stop24h 09m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 22 results
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Best time to book a flight from Ontario to Detroit

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

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Detroit (average of $250). Flying from Ontario to Detroit in March is currently the most expensive (average of $305). 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 DTT?

Find hourly flight availability from Ontario to Detroit. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s optimal to fly from Ontario to Detroit in the afternoon. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

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

Reviews of airlines servicing Detroit

Get insights into the airlines that provide service to Detroit. 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 Detroit. Reviews last updated September 16, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Detroit. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
7,957 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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.
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 Ontario to Detroit. 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 Ontario to Detroit?

    Airlines like Delta fly from Ontario to Detroit in about 7h 44m. The time it takes to get you to your destination can typically vary by up to . Ontario and Detroit are separated by a distance of 1929 mi.

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

    Flying on Spirit Airlines is currently your cheapest option to Detroit, with prices starting at $147. Additional round-trip tickets that might be worth considering are offered by Frontier and Delta, with the lowest prices starting at $149 and $292, respectively. These flights start at 68% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Detroit 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 Detroit?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Detroit (average of $250). Flying from Ontario to Detroit in March is currently the most expensive (average of $305). 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

Traveling to a place near Detroit?

Book flights to Detroit if you plan to visit one of these locations
Roseville
Port Huron

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Alternative routes for Ontario to Detroit

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

Discover the top 6 airlines that operate flights from Ontario to Detroit. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$147Average$199FlexibilityNo cancel feeOn-time65%
FrontierCheapest$149Average$278FlexibilityNo cancel feeOn-time62%
DeltaCheapest$292Average$523FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$335Average$491FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$394Average$528FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$408Average$624FlexibilityNo cancel feeOn-time69%

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