What is the cheapest airline that flies from Ontario to Detroit?

Frontier, Delta, and Alaska Airlines are the most popular carriers operating from Ontario to Detroit

What airlines fly to Detroit?

Spirit Airlines, Delta and American Airlines are the top three most popular airlines that fly to Detroit from Ontario according to our data. Spirit Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Detroit. Keep in mind that there are 6 different airlines that fly to Detroit on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Detroit?

Prices for flights from Ontario Airport to Detroit were last updated today.

How many operators does momondo search for flights from Ontario Airport to Detroit?

The number of operators available for flights from Ontario Airport to Detroit is 6 as of October 2025.

How old do you have to be to fly from Ontario Airport to Detroit?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Detroit.

What documentation or ID do you need to fly to Detroit?

The required travel and health documents for your Detroit trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Detroit. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$102 Cheap Flights from Ontario to Detroit in 2025/26

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Find the cheapest flights from Ontario to Detroit

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 11:49 pmONT-DTW

12h 49m1 stop

9:53 pm - 6:49 pmDTW-ONT

23h 56m1 stop

$206Multiple Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 12

6:53 am - 12:59 amONT-DTW

15h 06m1 stop

2:22 pm - 8:42 pmDTW-ONT

9h 20m1 stop

$207Multiple Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

8:00 am - 11:49 pmONT-DTW

12h 49m1 stop

9:53 pm - 6:49 pmDTW-ONT

23h 56m1 stop

$212Multiple Airlines

Find Deal

Tue, Oct 28 - Wed, Nov 5

6:53 am - 12:59 amONT-DTW

15h 06m1 stop

9:05 pm - 7:29 amDTW-ONT

37h 24m2 stops

$213Multiple Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

8:00 am - 11:49 pmONT-DTW

12h 49m1 stop

5:14 pm - 11:10 amDTW-ONT

20h 56m1 stop

$218Multiple Airlines

Find Deal

Tue, Oct 28 - Fri, Nov 7

8:00 am - 12:59 amONT-DTW

37h 59m2 stops

7:55 am - 11:50 pmDTW-ONT

18h 55m1 stop

$229Frontier

Find Deal

Tue, Oct 21 - Sat, Oct 25

6:53 am - 12:59 amONT-DTW

15h 06m1 stop

6:00 am - 4:28 pmDTW-ONT

37h 28m2 stops

$271Frontier

Find Deal

Wed, Oct 22 - Sun, Oct 26

4:11 pm - 3:55 pmONT-DTW

20h 44m1 stop

4:51 pm - 11:05 amDTW-ONT

21h 14m1 stop

$306Alaska Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

7:35 am - 10:28 pmONT-DTW

11h 53m1 stop

12:36 pm - 10:41 pmDTW-ONT

13h 05m1 stop

$307Delta

Find Deal

Sat, Nov 1 - Wed, Nov 5

4:11 pm - 3:55 pmONT-DTW

20h 44m1 stop

4:51 pm - 11:05 amDTW-ONT

21h 14m1 stop

$315Alaska Airlines

Find Deal

Sat, Nov 8 - Mon, Nov 10

Alaska Airlines flights from Ontario to Detroit

Our best Alaska Airlines deals on Ontario to Detroit flight tickets

Alaska Airlines

Nov 14

ONT4:11 pmOntario

20h 44m

1 stop

DTW3:55 pmDetroit Metropolitan Wayne County

Nov 17

DTW4:51 pmDetroit Metropolitan Wayne County

21h 14m

1 stop

ONT11:05 amOntario

$306

Find similar

Alaska Airlines

Nov 8

ONT4:11 pmOntario

20h 44m

1 stop

DTW3:55 pmDetroit Metropolitan Wayne County

Nov 10

DTW4:51 pmDetroit Metropolitan Wayne County

21h 14m

1 stop

ONT11:05 amOntario

$315

Find similar

Frontier flights from Ontario to Detroit

Our best Frontier deals on Ontario to Detroit flight tickets

Frontier

Oct 21

ONT8:00 amOntario

37h 59m

2 stops

DTW12:59 amDetroit Metropolitan Wayne County

Oct 25

DTW7:55 amDetroit Metropolitan Wayne County

18h 55m

1 stop

ONT11:50 pmOntario

$229

Find similar

Frontier

Oct 22

ONT6:53 amOntario

15h 06m

1 stop

DTW12:59 amDetroit Metropolitan Wayne County

Oct 26

DTW6:00 amDetroit Metropolitan Wayne County

37h 28m

2 stops

ONT4:28 pmOntario

$271

Find similar

Frontier

Oct 15

ONT7:15 amOntario

13h 07m

1 stop

DTW11:22 pmDetroit Metropolitan Wayne County

Oct 22

DTW6:00 amDetroit Metropolitan Wayne County

20h 50m

1 stop

ONT11:50 pmOntario

$294

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/29

8:00 am-11:49 pm

1 stop12h 49m

Detroit Metropolitan Wayne County

Wed 11/12

9:53 pm-6:49 pm

1 stop23h 56m

$206

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/22

6:53 am-12:59 am

1 stop15h 06m

Detroit Metropolitan Wayne County

Wed 10/29

2:22 pm-8:42 pm

1 stop9h 20m

$207

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 10/28

8:00 am-11:49 pm

1 stop12h 49m

Detroit Metropolitan Wayne County

Wed 11/5

9:53 pm-6:49 pm

1 stop23h 56m

$212

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/22

6:53 am-12:59 am

1 stop15h 06m

Detroit Metropolitan Wayne County

Wed 10/29

9:05 pm-7:29 am

2 stops37h 24m

$213

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 10/28

8:00 am-11:49 pm

1 stop12h 49m

Detroit Metropolitan Wayne County

Fri 11/7

5:14 pm-11:10 am

1 stop20h 56m

$218

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Tue 10/21

8:00 am-12:59 am

2 stops37h 59m

Detroit Metropolitan Wayne County

Sat 10/25

7:55 am-11:50 pm

1 stop18h 55m

$229

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Wed 10/22

6:53 am-12:59 am

1 stop15h 06m

Detroit Metropolitan Wayne County

Sun 10/26

6:00 am-4:28 pm

2 stops37h 28m

$271

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Fri 11/14

4:11 pm-3:55 pm

1 stop20h 44m

Detroit Metropolitan Wayne County

Mon 11/17

4:51 pm-11:05 am

1 stop21h 14m

$306

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 11/1

7:35 am-10:28 pm

1 stop11h 53m

Detroit Metropolitan Wayne County

Wed 11/5

12:36 pm-10:41 pm

1 stop13h 05m

$307

OntarioDetroit

ONT - DTW

ONTDTW

Ontario

Sat 11/8

4:11 pm-3:55 pm

1 stop20h 44m

Detroit Metropolitan Wayne County

Mon 11/10

4:51 pm-11:05 am

1 stop21h 14m

$315

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Detroit

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Detroit?

The cheapest month to fly to Detroit from Ontario is in September. Flight prices, which tend to average around $241, are often lower during this time because this is during the off-season. If you’re not able to fly to Detroit in September, then March is your next best option. Flight prices from Ontario to Detroit during March average around $352.

What is the cheapest day to depart on your flight to Detroit?

On average, the least expensive day to fly to Detroit from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $343. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Detroit for around $423.

What is the cheapest time of day to depart on your flight to Detroit?

In the afternoon is the cheapest time of day to fly from Ontario to Detroit when you can find flight prices for as low as $335. Flying to Detroit in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $406 on average. Flights to Detroit from Ontario at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Detroit from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Detroit for around $471 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Detroit from Ontario for as low as $340 on momondo.

How have Ontario to Detroit flight prices changed over time?

When to book flights from Ontario to Detroit

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Detroit according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Detroit (ONT to DTT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Detroit

Direct flights	None

There are no direct flights from Ontario to Detroit. There are no popular flight routes from Ontario to Detroit.

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How far is Ontario to Detroit by plane?
A flight from Ontario to Detroit will travel around 1947.2 mi. 6h 26m is a normal flight duration for this route.
When did momondo last update prices for flights from Ontario Airport to Detroit?
Prices for flights from Ontario Airport to Detroit were last updated today.
How many operators does momondo search for flights from Ontario Airport to Detroit?
The number of operators available for flights from Ontario Airport to Detroit is 6 as of October 2025.
How old do you have to be to fly from Ontario Airport to Detroit?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Detroit.
What documentation or ID do you need to fly to Detroit?
The required travel and health documents for your Detroit trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Detroit. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Ontario to Detroit?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ontario to Detroit is American Airlines (42% of total bookings). The next most popular airlines are Southwest (20%), Delta (14%), and United Airlines (13%).

Best airlines flying from Ontario to Detroit

Compare and see reviews for airlines that fly from Ontario to Detroit with momondo

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $147	Free Cancellation	Rating 6.3 8,082 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $149	Free Cancellation	Rating 5.8 3,145 reviews	Search Frontier flights
Delta	PriceFrom $292	Free Cancellation	Rating 7.9 7,969 reviews	Search Delta flights
American Airlines	PriceFrom $324	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights
Southwest	PriceFrom $394	Free Cancellation	Rating 8.0 4,236 reviews	Search Southwest flights
United Airlines	PriceFrom $408	Free Cancellation	Rating 7.4 8,965 reviews	Search United Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Detroit?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to Detroit. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ontario to Detroit with flexible booking policies on momondo?

Flights from Ontario to Detroit with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Detroit?

Once you have performed a search for Ontario to Detroit flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Detroit right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Detroit, momondo offers a useful price alert feature which will track prices for flights to Detroit from Ontario and alert you when they change.