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

Delta, Southwest, and United Airlines are the most popular carriers operating from Miami to Ontario

What airlines fly to Ontario?

JetBlue, American Airlines and Delta are the top three most popular airlines that fly to Ontario from Miami according to our data. JetBlue is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Miami Airport to Ontario Airport refresh daily.

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

The number of operators available for flights from Miami Airport to Ontario Airport is 3 as of September 2026.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Miami Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$127 Cheap Flights from Miami to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Miami to Los Angeles

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:55 pm - 10:35 amMIA Miami-ONT Ontario

14h 40m2 stops Atlanta Hartsfield-Jackson Denver Intl

11:52 am - 11:29 amONT Ontario-MIA Miami

20h 37m2 stops Denver Intl Atlanta Hartsfield-Jackson

$269Frontier

Mon, Oct 26 - Sat, Oct 31

5:50 am - 10:29 amMIA Miami-ONT Ontario

7h 39m1 stop Denver Intl

11:52 am - 11:29 amONT Ontario-MIA Miami

20h 37m2 stops Denver Intl Atlanta Hartsfield-Jackson

$272Frontier

Sat, Oct 24 - Sat, Oct 31

5:50 am - 10:29 amMIA Miami-ONT Ontario

7h 39m1 stop Denver Intl

11:52 am - 12:44 amONT Ontario-MIA Miami

9h 52m1 stop Denver Intl

$274Frontier

Sat, Oct 24 - Sat, Oct 31

5:05 am - 11:51 pmMIA Miami-ONT Ontario

21h 46m3 stops Atlanta Hartsfield-Jackson Dallas/Fort Worth Denver Intl

11:52 am - 10:50 amONT Ontario-MIA Miami

19h 58m2 stops Denver Intl Minneapolis St Paul

$331Multiple Airlines

Tue, Nov 10 - Sat, Nov 14

5:05 am - 11:51 pmMIA Miami-ONT Ontario

21h 46m3 stops Atlanta Hartsfield-Jackson Dallas/Fort Worth Denver Intl

11:52 am - 10:50 amONT Ontario-MIA Miami

19h 58m2 stops Denver Intl Minneapolis St Paul

$343Multiple Airlines

Tue, Nov 10 - Sat, Nov 14

5:50 am - 10:29 amMIA Miami-ONT Ontario

7h 39m1 stop Denver Intl

11:52 am - 11:50 amONT Ontario-MIA Miami

20h 58m2 stops Denver Intl Minneapolis St Paul

$356Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

5:30 pm - 11:01 pmMIA Miami-ONT Ontario

8h 31m1 stop Charlotte Douglas

10:30 pm - 9:09 amONT Ontario-MIA Miami

7h 39m1 stop Charlotte Douglas

$397American Airlines

Thu, Dec 3 - Mon, Dec 7

5:20 am - 9:35 amMIA Miami-ONT Ontario

7h 15m1 stop Dallas/Fort Worth

2:22 pm - 12:03 amONT Ontario-MIA Miami

6h 41m1 stop Dallas/Fort Worth

$398American Airlines

Sat, Oct 24 - Sat, Oct 31

9:25 am - 7:50 pmMIA Miami-ONT Ontario

13h 25m2 stops Dallas Love Field Phoenix Sky Harbor Intl

5:40 am - 6:40 pmONT Ontario-MIA Miami

10h 00m2 stops Phoenix Sky Harbor Intl Dallas Love Field

$435Southwest

Wed, Nov 18 - Thu, Nov 26

5:15 am - 11:50 amMIA Miami-ONT Ontario

9h 35m2 stops Houston Hobby Phoenix Sky Harbor Intl

9:00 am - 10:15 pmONT Ontario-MIA Miami

10h 15m2 stops Las Vegas Harry Reid Intl Orlando

$467Southwest

Mon, Dec 21 - Thu, Jan 7

Cheap last minute flights

Enter your travel dates to find the best prices.

5:50 am - 10:30 amMIA Miami-ONT Ontario

7h 40m1 stop Denver Intl

11:52 am - 12:47 amONT Ontario-MIA Miami

9h 55m1 stop Denver Intl

$393Frontier

Thu, Oct 1 - Tue, Oct 20

5:50 am - 10:30 amMIA Miami-ONT Ontario

7h 40m1 stop Denver Intl

5:25 pm - 10:15 amONT Ontario-MIA Miami

13h 50m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

$425Frontier

Thu, Oct 1 - Tue, Oct 20

5:55 am - 10:30 amMIA Miami-ONT Ontario

7h 35m1 stop Denver Intl

7:15 am - 1:10 pmONT Ontario-MIA Miami

26h 55m1 stop Houston George Bush Intcntl

$442Frontier

Sat, Oct 3 - Mon, Nov 23

5:50 am - 10:30 amMIA Miami-ONT Ontario

7h 40m1 stop Denver Intl

11:52 am - 12:47 amONT Ontario-MIA Miami

9h 55m1 stop Denver Intl

$493Frontier

Mon, Sep 28 - Tue, Oct 13

5:50 am - 10:30 amMIA Miami-ONT Ontario

7h 40m1 stop Denver Intl

11:45 am - 12:46 amONT Ontario-MIA Miami

10h 01m1 stop Denver Intl

$495Frontier

Tue, Sep 29 - Wed, Oct 7

6:00 am - 11:07 amMIA Miami-ONT Ontario

8h 07m1 stop Atlanta Hartsfield-Jackson

5:03 pm - 6:22 amONT Ontario-MIA Miami

10h 19m1 stop Salt Lake City

$562Delta

Sat, Oct 3 - Fri, Oct 9

6:00 am - 11:05 amMIA Miami-ONT Ontario

8h 05m1 stop Atlanta Hartsfield-Jackson

5:15 pm - 5:49 amONT Ontario-MIA Miami

9h 34m1 stop Salt Lake City

$587Delta

Tue, Sep 29 - Tue, Sep 29

9:30 am - 1:25 pmMIA Miami-ONT Ontario

6h 55m1 stop Dallas/Fort Worth

2:22 pm - 12:03 amONT Ontario-MIA Miami

6h 41m1 stop Dallas/Fort Worth

$649American Airlines

Fri, Oct 2 - Sat, Oct 10

8:02 am - 12:46 pmMIA Miami-ONT Ontario

7h 44m1 stop Denver Intl

6:00 am - 3:54 pmONT Ontario-MIA Miami

6h 54m1 stop Houston George Bush Intcntl

$692United Airlines

Sat, Oct 3 - Sat, Oct 10

1:15 pm - 8:58 pmMIA Miami-ONT Ontario

10h 43m2 stops Houston George Bush Intcntl Denver Intl

8:03 am - 8:53 pmONT Ontario-MIA Miami

9h 50m1 stop San Francisco

$697United Airlines

Tue, Sep 29 - Tue, Oct 13

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Frontier flights from Miami to Ontario

Our best Frontier deals on Miami to Ontario flight tickets

Frontier

Oct 26

MIA10:55 pmMiami

14h 40m

2 stops

ONT10:35 amOntario

Oct 31

ONT11:52 amOntario

20h 37m

2 stops

MIA11:29 amMiami

$269

Frontier

Oct 20

MIA10:36 pmMiami

14h 53m

2 stops

ONT10:29 amOntario

Oct 27

ONT11:52 amOntario

19h 37m

2 stops

MIA10:29 amMiami

$270

Frontier

Oct 24

MIA5:50 amMiami

7h 39m

1 stop

ONT10:29 amOntario

Oct 31

ONT11:52 amOntario

20h 37m

2 stops

MIA11:29 amMiami

$272

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Mon 10/26

10:55 pm-10:35 am

2 stops14h 40m

Ontario

Sat 10/31

11:52 am-11:29 am

2 stops20h 37m

$269

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Sat 10/24

5:50 am-10:29 am

1 stop7h 39m

Ontario

Sat 10/31

11:52 am-11:29 am

2 stops20h 37m

$272

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Sat 10/24

5:50 am-10:29 am

1 stop7h 39m

Ontario

Sat 10/31

11:52 am-12:44 am

1 stop9h 52m

$274

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Tue 11/10

5:05 am-11:51 pm

3 stops21h 46m

Ontario

Sat 11/14

11:52 am-10:50 am

2 stops19h 58m

$331

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Tue 11/10

5:05 am-11:51 pm

3 stops21h 46m

Ontario

Sat 11/14

11:52 am-10:50 am

2 stops19h 58m

$343

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Sat 10/24

5:50 am-10:29 am

1 stop7h 39m

Ontario

Sat 10/31

11:52 am-11:50 am

2 stops20h 58m

$356

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Thu 12/3

5:30 pm-11:01 pm

1 stop8h 31m

Ontario

Mon 12/7

10:30 pm-9:09 am

1 stop7h 39m

$397

Quickest round-trip

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Sat 10/24

5:20 am-9:35 am

1 stop7h 15m

Ontario

Sat 10/31

2:22 pm-12:03 am

1 stop6h 41m

$398

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 11/18

9:25 am-7:50 pm

2 stops13h 25m

Ontario

Thu 11/26

5:40 am-6:40 pm

2 stops10h 00m

$435

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Mon 12/21

5:15 am-11:50 am

2 stops9h 35m

Ontario

Thu 1/7

9:00 am-10:15 pm

2 stops10h 15m

$467

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 Miami to Ontario

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 typical price of a round-trip flight between Miami and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $294 to $446.
The lowest price recently found on this route was $269.

What is the cheapest month to fly to Ontario?

In general, June is the cheapest month to fly from Miami to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $341. If you aren’t able to travel during the month of June, then book flights to Ontario from Miami during February instead. Flights to Ontario in February, while not as cheap as those in June, still average around $347.

How have Miami to Ontario flight prices changed over time?

As of September 2026, prices for Miami to Ontario flights are approximately 80% more expensive when compared to flights at the same time last year.

When to book flights from Miami to Ontario

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

Estimated round-trip price

Cheap Miami to Ontario (MIA to ONT) flight deals and tips

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

Best Price Found	$127
Fastest flight time	7h 06m
Direct flights	None

The best one-way flight to Ontario from Miami in the past 72 hours is $127. The best round-trip flight deal from Miami to Ontario found on momondo in the last 72 hours is $269.

The fastest flight from Miami to Ontario takes 7h 06m

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

Search flight deals

Frequently asked questions about flying from Miami to Ontario

How far is Miami to Ontario by plane?
A flight from Miami to Ontario will travel around 2299.8 mi. 7h 06m is a normal flight duration for this route.
When did momondo last update prices for flights from Miami Airport to Ontario Airport?
Prices for flights from Miami Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Miami Airport to Ontario Airport?
The number of operators available for flights from Miami Airport to Ontario Airport is 3 as of September 2026.
How old do you have to be to fly from Miami Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Miami Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Miami to Ontario?
momondo data reveals that the most frequently booked airline on the route from Miami to Ontario is American Airlines, representing 66% of all bookings. The subsequent popular airlines are Frontier at 20% and Southwest at 13%.

Best airlines flying from Miami to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $165	Free Cancellation	Rating 5.6 2,573 reviews	Search Frontier flights
American Airlines	PriceFrom $306	Free Cancellation	Rating 7.0 12,097 reviews	Search American Airlines flights
Southwest	PriceFrom $326	Free Cancellation	Rating 8.0 4,201 reviews	Search Southwest flights
Delta	PriceFrom $341	Free Cancellation	Rating 7.8 8,609 reviews	Search Delta flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Miami.

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

Flights from Miami to Ontario 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 Miami to Ontario?

Once all potential Miami to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Ontario from Miami. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Miami to Los Angeles from $127

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Miami to Los Angeles departing on 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Miami to Ontario

Our best Frontier deals on Miami to Ontario flight tickets

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How to get the cheapest flight ticket from Miami to Ontario

What is the typical price of a round-trip flight between Miami and Ontario?

What is the cheapest month to fly to Ontario?

How have Miami to Ontario flight prices changed over time?

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

What airlines fly to Ontario?

When to book flights from Miami to Ontario

Cheap Miami to Ontario (MIA to ONT) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Miami to Ontario

Best airlines flying from Miami to Ontario

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

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Los Angeles

List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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