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$121+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — DTT
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$238
(CheapOair)

One-way from

$121
(Trip.com)

Popular in

January

Cheapest in

March

Average price

$394
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. 15% potential increase in price ($84 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This CheapOair deal was found by Cheapflights users on 7/31. 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.
Sat 9/278:59 pmONT - DTW
1 stop24h 47mFrontier
Sat 10/48:00 amDTW - ONT
1 stop14h 54mFrontier
Deal found 7/31$238
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2910:35 pmONT - DTW
1 stop9h 04mAmerican Airlines
Tue 10/77:33 amDTW - ONT
1 stop14h 02mAmerican Airlines
Deal found 7/30$327
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:06 pmONT - DTW
1 stop11h 01mHawaiian Airlines
Tue 9/236:30 amDTW - ONT
1 stop10h 42mHawaiian Airlines
Deal found 7/29$331
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/263:04 pmONT - DTW
1 stop11h 01mAlaska Airlines
Thu 9/46:30 amDTW - ONT
1 stop10h 42mAlaska Airlines
Deal found 7/29$336
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/21:15 pmONT - DTW
1 stop7h 44mDelta
Wed 9/105:25 amDTW - ONT
1 stop8h 10mDelta
Deal found 7/31$337
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 amONT - DTW
1 stop6h 46mUnited Airlines
Sat 9/276:00 amDTW - ONT
2 stops9h 51mUnited Airlines
Deal found 7/29$342

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 July 31, 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

Sat 9/27

8:59 pm-12:46 am

1 stop24h 47m

Detroit Metropolitan Wayne County

Sat 10/4

8:00 am-7:54 pm

1 stop14h 54m

$238

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Mon 9/29

10:35 pm-10:39 am

1 stop9h 04m

Detroit Metropolitan Wayne County

Tue 10/7

7:33 am-6:35 pm

1 stop14h 02m

$327

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Mon 9/22

3:06 pm-5:07 am

1 stop11h 01m

Detroit Metropolitan Wayne County

Tue 9/23

6:30 am-2:12 pm

1 stop10h 42m

$331

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 8/26

3:04 pm-5:05 am

1 stop11h 01m

Detroit Metropolitan Wayne County

Wed 9/3

6:30 am-2:12 pm

1 stop10h 42m

$336

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 9/2

1:15 pm-11:59 pm

1 stop7h 44m

Detroit Metropolitan Wayne County

Tue 9/9

2:59 pm-7:11 pm

1 stop7h 12m

$337

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 9/24

7:00 am-4:46 pm

1 stop6h 46m

Detroit Metropolitan Wayne County

Sat 9/27

6:00 am-12:51 pm

2 stops9h 51m

$342

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Thu 11/6

9:15 am-10:40 pm

2 stops10h 25m

Detroit Metropolitan Wayne County

Mon 11/10

7:15 am-12:30 pm

2 stops8h 15m

$360

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 9/3

10:56 pm-11:30 am

1 stop9h 34m

Detroit Metropolitan Wayne County

Mon 9/22

12:16 pm-9:29 pm

1 stop12h 13m

$372

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 8/26

8:00 am-5:45 am

1 stop18h 45m

$121

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 8/16

5:21 pm-10:59 am

1 stop14h 38m

$125

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 16 results
1
2

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, April is the cheapest month in which you can book a flight from Ontario to Detroit (average of $257). 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 July 31, 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 July 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

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

    Flying on Frontier is currently your cheapest option to Detroit, with prices starting at $238. Additional round-trip tickets that might be worth considering are offered by American Airlines and Hawaiian Airlines, with the lowest prices starting at $327 and $331, respectively. These flights start at 47% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $125. Alaska Airlines flights start at $168 while deals on American Airlines start at $169 one-way.

  • 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, April is the cheapest month in which you can book a flight from Ontario to Detroit (average of $257). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$126Average$245FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$157Average$247FlexibilityNo cancel feeOn-time65%
DeltaCheapest$292Average$504FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$356Average$490FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$394Average$590FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$408Average$563FlexibilityNo cancel feeOn-time69%

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