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 $205. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and American Airlines, with the lowest prices starting at $262 and $263, respectively. These flights start at 53% 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 $108. Hawaiian Airlines flights start at $128 while deals on Alaska Airlines start at $131 one-way.

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

Travelers seeking maximum savings on their Ontario to Detroit flight should consider departing on Saturday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Ontario to Detroit?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Ontario to Detroit.

What is the cheapest day to fly round-trip from Ontario to Detroit?

Users have found that flying from Ontario to Detroit on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Ontario to Detroit?

Users have found that booking a flight from Ontario to Detroit at least 54 days early can save you up to 91% on average compared to booking a flight this week. If booking 54 days before your flight isn’t an option for you, users have found flights from Ontario to Detroit for as little as $241 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $417 for flights departing within the next 3 days.

What is the cheapest month to fly from Ontario to Detroit?

January is one of the best times of the year to fly to Detroit from Ontario. Prices for January average $331 per person but you can even find prices for as low as $139. The most expensive prices can be found in the month of March. Opting for a January flight can save you 28% on your journey compared to booking in March

Most accurate provider : When it comes to deals on Ontario-Detroit flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Detroit flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Detroit flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Detroit flights, Cheapflights users trust Priceline the most. Priceline 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 Ontario-Detroit flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$108+ Flights from Ontario to Detroit - Compare & Save Big

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Cheap flight deals from Ontario to Detroit

Most accurate provider	FlightHub 3 stars
Most trusted provider	Priceline 3 stars
Round-trip from	$205 (Gotogate)
One-way from	$108 (Cheapflightsfares)
Popular in	January
Cheapest in	July
Average price	$366

Provider with most accurate pricing for Ontario-Detroit (DTT) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Detroit (DTT) flights.

Search Deals

From Ontario to Detroit (DTT)

Search Deals

One-way flight from Ontario to Detroit (DTT)

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($94 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in May 2025

Search Deals

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 May 12, 2025.

Wed 5/211:08 pmONT - DTW

1 stop23h 18mFrontier

Wed 5/289:55 pmDTW - ONT

1 stop21h 36mFrontier

Deal found 5/11

$205

Tue 6/104:45 pmONT - DTW

1 stop9h 29mAlaska Airlines

Wed 6/117:00 amDTW - ONT

1 stop11h 50mAlaska Airlines

Deal found 5/12

$262

Wed 7/237:05 pmONT - DTW

1 stop7h 19mAmerican Airlines

Tue 7/295:28 amDTW - ONT

1 stop7h 33mAmerican Airlines

Deal found 5/11

$263

Wed 7/91:15 pmONT - DTW

1 stop8h 08mDelta

Tue 7/227:00 amDTW - ONT

1 stop8h 14mDelta

Deal found 5/12

$277

Thu 6/126:00 amONT - DTW

1 stop6h 26mMultiple Airlines

Wed 7/97:00 amDTW - ONT

1 stop10h 46mMultiple Airlines

Deal found 5/11

$295

Thu 6/126:41 pmONT - DTW

1 stop7h 17mUnited Airlines

Wed 7/93:41 pmDTW - ONT

2 stops10h 11mUnited Airlines

Deal found 5/11

$296

Tue 6/106:20 amONT - DTW

2 stops9h 25mSouthwest

Wed 6/116:35 amDTW - ONT

2 stops8h 50mSouthwest

Deal found 5/12

$363

Wed 10/1511:00 pmONT - DTW

1 stop9h 30mJetBlue

Wed 10/2212:15 pmDTW - ONT

1 stop12h 26mJetBlue

Deal found 5/12

$367

Tue 7/14:00 pmONT - DTW

1 stop10h 03mHawaiian Airlines

Thu 7/317:00 amDTW - ONT

1 stop9h 26mHawaiian Airlines

Deal found 5/11

$451

Best flights from Ontario to Detroit
Discover carefully curated flight deals from Ontario to Detroit that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 12, 2025.

Wed 5/285:21 pmONT - DTW

1 stop28h 23mFrontier

Tue 6/310:06 pmDTW - ONT

1 stop16h 38mFrontier

Deal found 5/11

$205

Tue 6/104:45 pmONT - DTW

1 stop9h 29mAlaska Airlines

Wed 6/117:00 amDTW - ONT

1 stop11h 50mAlaska Airlines

Deal found 5/12

$262

Wed 7/237:05 pmONT - DTW

1 stop7h 19mAmerican Airlines

Tue 7/295:28 amDTW - ONT

1 stop7h 33mAmerican Airlines

Deal found 5/11

$263

Wed 7/91:15 pmONT - DTW

1 stop8h 08mDelta

Wed 7/168:21 pmDTW - ONT

1 stop6h 21mDelta

Deal found 5/12

$277

Thu 6/126:41 pmONT - DTW

1 stop7h 17mUnited Airlines

Wed 7/93:41 pmDTW - ONT

1 stop8h 13mUnited Airlines

Deal found 5/11

$291

Thu 6/126:00 amONT - DTW

1 stop6h 26mMultiple Airlines

Wed 7/97:00 amDTW - ONT

1 stop10h 46mMultiple Airlines

Deal found 5/11

$295

Tue 6/106:20 amONT - DTW

2 stops9h 25mSouthwest

Wed 6/116:35 amDTW - ONT

2 stops8h 50mSouthwest

Deal found 5/12

$363

Wed 10/1511:00 pmONT - DTW

1 stop9h 30mJetBlue

Wed 10/2212:15 pmDTW - ONT

1 stop12h 26mJetBlue

Deal found 5/12

$367

Tue 7/14:00 pmONT - DTW

1 stop10h 03mHawaiian Airlines

Thu 7/317:00 amDTW - ONT

1 stop9h 26mHawaiian Airlines

Deal found 5/11

$451

Last-minute flights from Ontario to Detroit
Discover last-minute flight deals from Ontario to Detroit. Data last updated May 12, 2025 and is based on user searches.

Mon 5/194:45 pmONT - DTW

1 stop9h 29mAlaska Airlines

Thu 5/294:53 pmDTW - ONT

1 stop8h 53mAlaska Airlines

Deal found 5/11

$411

Mon 5/191:10 pmONT - DTW

1 stop7h 44mDelta

Tue 5/275:56 pmDTW - ONT

1 stop8h 46mDelta

Deal found 5/11

$412

Wed 5/211:08 pmONT - DTW

1 stop23h 18mFrontier

Wed 5/289:55 pmDTW - ONT

1 stop21h 36mFrontier

Deal found 5/11

$205

Wed 5/211:14 pmONT - DTW

1 stop6h 45mAmerican Airlines

Sun 5/255:30 amDTW - ONT

2 stops9h 20mAmerican Airlines

Deal found 5/12

$417

Wed 5/215:05 amONT - DTW

2 stops12h 17mUnited Airlines

Wed 6/46:09 pmDTW - ONT

1 stop7h 17mUnited Airlines

Deal found 5/12

$445

Wed 5/2110:45 amONT - DTW

2 stops8h 20mSouthwest

Wed 5/284:05 pmDTW - ONT

2 stops8h 40mSouthwest

Deal found 5/11

$467

Thu 5/225:10 amONT - DTW

1 stop6h 29mMultiple Airlines

Sun 5/254:53 pmDTW - ONT

1 stop8h 53mMultiple Airlines

Deal found 5/12

$857

Tue 6/104:45 pmONT - DTW

1 stop9h 29mAlaska Airlines

Wed 6/117:00 amDTW - ONT

1 stop11h 50mAlaska Airlines

Deal found 5/12

$262

Tue 6/1012:55 pmONT - DTW

2 stops8h 27mAmerican Airlines

Wed 6/114:06 pmDTW - ONT

1 stop9h 56mAmerican Airlines

Deal found 5/12

$268

Tue 6/106:20 amONT - DTW

2 stops9h 25mSouthwest

Wed 6/116:35 amDTW - ONT

2 stops8h 50mSouthwest

Deal found 5/12

$363

Thu 6/126:00 amONT - DTW

1 stop6h 26mMultiple Airlines

Wed 7/97:00 amDTW - ONT

1 stop10h 46mMultiple Airlines

Deal found 5/11

$295

Thu 6/126:41 pmONT - DTW

1 stop7h 17mUnited Airlines

Wed 7/93:41 pmDTW - ONT

2 stops10h 11mUnited Airlines

Deal found 5/11

$296

One-way flights from Ontario to Detroit
Search for one-way flight options from Ontario to Detroit. Find affordable one-way fares based on user searches. Data last updated May 12, 2025.

Thu 6/56:00 amONT - DTW

1 stop6h 26mFrontier

Deal found 5/11

$108

Wed 7/164:00 pmONT - DTW

1 stop10h 03mHawaiian Airlines

Deal found 5/12

$128

Tue 7/84:00 pmONT - DTW

1 stop10h 03mAlaska Airlines

Deal found 5/12

$131

Tue 7/1512:46 pmONT - DTW

1 stop6h 37mAmerican Airlines

Deal found 5/11

$132

Tue 7/11:15 pmONT - DTW

1 stop7h 40mDelta

Deal found 5/12

$139

Sun 6/156:00 amONT - DTW

1 stop20h 40mMultiple Airlines

Deal found 5/12

$152

Tue 8/197:00 amONT - DTW

1 stop6h 46mUnited Airlines

Deal found 5/11

$177

Thu 6/512:55 pmONT - DTW

2 stops9h 10mSouthwest

Deal found 5/12

$245

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Detroit that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 5/28

5:21 pm-12:44 am

1 stop28h 23m

Detroit Metropolitan Wayne County

Tue 6/3

10:06 pm-11:44 am

1 stop16h 38m

$205

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 6/10

4:45 pm-5:14 am

1 stop9h 29m

Detroit Metropolitan Wayne County

Wed 6/11

7:00 am-3:50 pm

1 stop11h 50m

$262

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 7/23

7:05 pm-5:24 am

1 stop7h 19m

Detroit Metropolitan Wayne County

Tue 7/29

5:28 am-10:01 am

1 stop7h 33m

$263

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 7/9

1:15 pm-12:23 am

1 stop8h 08m

Detroit Metropolitan Wayne County

Tue 7/22

7:00 am-12:14 pm

1 stop8h 14m

$277

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Thu 6/12

6:41 pm-4:58 am

1 stop7h 17m

Detroit Metropolitan Wayne County

Wed 7/9

3:41 pm-8:54 pm

1 stop8h 13m

$291

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Thu 6/12

6:00 am-3:26 pm

1 stop6h 26m

Detroit Metropolitan Wayne County

Wed 7/9

7:00 am-2:46 pm

1 stop10h 46m

$295

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 6/10

6:20 am-6:45 pm

2 stops9h 25m

Detroit Metropolitan Wayne County

Wed 6/11

6:35 am-12:25 pm

2 stops8h 50m

$363

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/15

11:00 pm-11:30 am

1 stop9h 30m

Detroit Metropolitan Wayne County

Wed 10/22

12:15 pm-9:41 pm

1 stop12h 26m

$367

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 7/1

4:00 pm-5:03 am

1 stop10h 03m

Detroit Metropolitan Wayne County

Thu 7/31

7:00 am-1:26 pm

1 stop9h 26m

$451

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Thu 6/5

6:00 am-3:26 pm

1 stop6h 26m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 17 results

Compare providers for flights from Ontario to Detroit

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Detroit in May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy2 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*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 Ontario-Detroit flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Detroit flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Detroit flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Detroit flights, Cheapflights users trust Priceline the most. Priceline 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 Ontario-Detroit 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 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?

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.

Rainfall in Detroit by month

In terms of precipitation, rainfall in Detroit ranges from 1.8 - 3.1 inches per month. August is typically the wettest month, when rainfall can reach 3.1 in. January is typically the driest time to visit Detroit when rainfall is around 1.8 in.

Temperature in Detroit by month

If weather is an important factor for your trip to Detroit, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

Reviews of airlines servicing Detroit

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Ontario to Detroit 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.

Alaska Airlines

8.0

Very good

10,000 reviews

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

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

4,290 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

7,950 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.9

Good

2,431 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

8,724 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

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

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 $205. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and American Airlines, with the lowest prices starting at $262 and $263, respectively. These flights start at 53% 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 $108. Hawaiian Airlines flights start at $128 while deals on Alaska Airlines start at $131 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

Port Huron

Roseville

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Ontario to Detroit

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$130	Average$247	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$148	Average$244	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$292	Average$527	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$356	Average$500	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$378	Average$536	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$394	Average$604	FlexibilityNo cancel fee	On-time63%

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$108+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Detroit with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to Detroit

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to Detroit

Cheapest flights from Ontario to DetroitExplore 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 May 12, 2025.

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 May 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Detroit that are best for you.

Compare providers for flights from Ontario to Detroit

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 Ontario to Detroit in May.

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.

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?

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 May 12, 2025.

Rainfall in Detroit by month

Plan your trip to Detroit by taking into account the average rainfall totals by month.

Temperature in Detroit by month

Plan your trip to Detroit by taking into account the average temperature totals by month.

Reviews of airlines servicing Detroit

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Ontario to Detroit 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.

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?

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

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

How can I find direct flights from Ontario to Detroit?

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

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

Traveling to a place near Ontario?

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Alternative routes for Ontario to Detroit

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Top 6 airlines flying from Ontario to Detroit

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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 May 12, 2025.