What is the most punctual flight time for Miami to Ontario flights?

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

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

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

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

How often are flights from Miami to Ontario delayed?

Historically, on average around 0% of flights between Miami and Ontario have experienced a delay on any given week. The average delay length over the past 12 months has been 0 minutes.

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 4 as of August 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.

$117 Cheap Flights from Miami to Ontario in 2026

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11:25 am - 5:48 pmMIA Miami-ONT Ontario

9h 23m1 stop Houston George Bush Intcntl

6:47 pm - 5:32 pmONT Ontario-MIA Miami

19h 45m1 stop Houston George Bush Intcntl

$255Frontier

Thu, Sep 24 - Thu, Oct 15

11:25 am - 5:48 pmMIA Miami-ONT Ontario

9h 23m1 stop Houston George Bush Intcntl

11:52 am - 9:50 pmONT Ontario-MIA Miami

30h 58m2 stops Denver Intl Atlanta Hartsfield-Jackson

$257Frontier

Thu, Sep 24 - Wed, Oct 14

6:00 am - 11:27 amMIA Miami-ONT Ontario

8h 27m1 stop Atlanta Hartsfield-Jackson

12:00 pm - 10:45 pmONT Ontario-MIA Miami

7h 45m1 stop Atlanta Hartsfield-Jackson

$397Delta

Wed, Feb 10 - Wed, Feb 17

6:50 am - 12:30 pmMIA Miami-ONT Ontario

8h 40m1 stop Salt Lake City

12:00 pm - 12:52 amONT Ontario-MIA Miami

9h 52m1 stop Atlanta Hartsfield-Jackson

$397Delta

Thu, Jan 7 - Sat, Jan 30

11:30 am - 7:35 pmMIA Miami-ONT Ontario

11h 05m2 stops Austin Bergstrom Las Vegas Harry Reid Intl

6:10 am - 4:55 pmONT Ontario-MIA Miami

7h 45m2 stops Phoenix Sky Harbor Intl Dallas Love Field

$407Southwest

Wed, Oct 21 - Wed, Oct 28

5:40 pm - 10:37 pmMIA Miami-ONT Ontario

7h 57m1 stop Dallas/Fort Worth

6:00 am - 6:09 pmONT Ontario-MIA Miami

9h 09m1 stop Dallas/Fort Worth

$413American Airlines

Wed, Sep 9 - Sat, Sep 12

7:55 am - 1:50 pmMIA Miami-ONT Ontario

8h 55m2 stops Nashville Intl Phoenix Sky Harbor Intl

11:00 am - 10:00 pmONT Ontario-MIA Miami

8h 00m1 stop Houston Hobby

$418Southwest

Sun, Sep 6 - Thu, Sep 10

3:52 pm - 8:53 pmMIA Miami-ONT Ontario

8h 01m1 stop Denver Intl

5:00 am - 10:34 pmONT Ontario-MIA Miami

14h 34m2 stops Denver Intl Houston George Bush Intcntl

$418United Airlines

Wed, Sep 9 - Sat, Sep 12

6:18 pm - 10:17 amMIA Miami-ONT Ontario

18h 59m1 stop Seattle/Tacoma Intl

6:02 am - 5:15 pmONT Ontario-MIA Miami

32h 13m1 stop Seattle/Tacoma Intl

$425Alaska Airlines

Mon, Oct 5 - Fri, Oct 9

11:00 am - 6:17 pmMIA Miami-ONT Ontario

10h 17m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

12:37 pm - 11:59 pmONT Ontario-MIA Miami

8h 22m1 stop Dallas/Fort Worth

$487American Airlines

Wed, Sep 16 - Sat, Sep 19

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 11:50 pmMIA Miami-ONT Ontario

20h 50m1 stop Denver Intl

9:33 am - 11:55 pmONT Ontario-MIA Miami

11h 22m1 stop Houston George Bush Intcntl

$378Frontier

Sun, Aug 30 - Sun, Sep 6

6:00 am - 11:50 pmMIA Miami-ONT Ontario

20h 50m1 stop Denver Intl

9:33 am - 2:33 pmONT Ontario-MIA Miami

26h 00m1 stop Houston George Bush Intcntl

$388Frontier

Thu, Aug 27 - Mon, Aug 31

6:00 am - 11:50 pmMIA Miami-ONT Ontario

20h 50m1 stop Denver Intl

9:33 am - 11:55 pmONT Ontario-MIA Miami

11h 22m1 stop Houston George Bush Intcntl

$388Frontier

Thu, Aug 27 - Fri, Aug 28

6:00 am - 10:42 amMIA Miami-ONT Ontario

7h 42m1 stop Atlanta Hartsfield-Jackson

12:00 pm - 12:47 amONT Ontario-MIA Miami

9h 47m1 stop Atlanta Hartsfield-Jackson

$490Delta

Sat, Aug 29 - Sat, Sep 5

2:08 pm - 7:53 pmMIA Miami-ONT Ontario

8h 45m1 stop Atlanta Hartsfield-Jackson

7:05 am - 6:42 pmONT Ontario-MIA Miami

8h 37m1 stop Atlanta Hartsfield-Jackson

$567Delta

Wed, Aug 26 - Sat, Aug 29

3:30 pm - 11:04 amMIA Miami-ONT Ontario

22h 34m2 stops Dallas/Fort Worth Seattle/Tacoma Intl

7:56 pm - 4:52 amONT Ontario-MIA Miami

29h 56m1 stop Denver Intl

$642Multiple Airlines

Thu, Aug 27 - Sat, Aug 29

3:52 pm - 8:53 pmMIA Miami-ONT Ontario

8h 01m1 stop Denver Intl

5:00 am - 10:34 pmONT Ontario-MIA Miami

14h 34m2 stops Denver Intl Houston George Bush Intcntl

$660United Airlines

Sat, Aug 29 - Sat, Sep 5

12:15 pm - 6:15 pmMIA Miami-ONT Ontario

9h 00m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

6:15 am - 6:39 pmONT Ontario-MIA Miami

9h 24m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

$665American Airlines

Thu, Aug 27 - Sat, Aug 29

8:50 am - 3:19 pmMIA Miami-ONT Ontario

9h 29m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

6:15 am - 6:39 pmONT Ontario-MIA Miami

9h 24m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth

$665American Airlines

Thu, Aug 27 - Sat, Aug 29

7:00 am - 3:15 pmMIA Miami-ONT Ontario

11h 15m2 stops Orlando Las Vegas Harry Reid Intl

5:45 am - 8:05 pmONT Ontario-MIA Miami

11h 20m2 stops Las Vegas Harry Reid Intl Nashville Intl

$713Southwest

Thu, Aug 27 - Thu, Dec 3

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Frontier flights from Miami to Ontario

Our best Frontier deals on Miami to Ontario flight tickets

Frontier

Sep 24

MIA11:25 amMiami

9h 23m

1 stop

ONT5:48 pmOntario

Oct 15

ONT6:47 pmOntario

19h 45m

1 stop

MIA5:32 pmMiami

$255

Frontier

Sep 24

MIA11:25 amMiami

9h 23m

1 stop

ONT5:48 pmOntario

Oct 14

ONT11:52 amOntario

30h 58m

2 stops

MIA9:50 pmMiami

$257

Frontier

Sep 22

MIA9:43 pmMiami

29h 04m

2 stops

ONT11:47 pmOntario

Oct 15

ONT6:47 pmOntario

19h 45m

1 stop

MIA5:32 pmMiami

$259

Delta flights from Miami to Ontario

Our best Delta deals on Miami to Ontario flight tickets

Delta

Sep 6

MIA2:08 pmMiami

7h 22m

1 stop

ONT6:30 pmOntario

Sep 12

ONT5:15 pmOntario

9h 34m

1 stop

MIA5:49 amMiami

$405

Delta

Sep 6

MIA6:00 amMiami

7h 42m

1 stop

ONT10:42 amOntario

Sep 10

ONT12:17 pmOntario

9h 38m

1 stop

MIA12:55 amMiami

$413

Delta

Sep 5

MIA6:00 amMiami

7h 42m

1 stop

ONT10:42 amOntario

Sep 8

ONT5:15 pmOntario

9h 34m

1 stop

MIA5:49 amMiami

$465

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Thu 9/24

11:25 am-5:48 pm

1 stop9h 23m

Ontario

Thu 10/15

6:47 pm-5:32 pm

1 stop19h 45m

$255

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Thu 9/24

11:25 am-5:48 pm

1 stop9h 23m

Ontario

Wed 10/14

11:52 am-9:50 pm

2 stops30h 58m

$257

Quickest round-trip

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 2/10

6:00 am-11:27 am

1 stop8h 27m

Ontario

Wed 2/17

12:00 pm-10:45 pm

1 stop7h 45m

$397

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Thu 1/7

6:50 am-12:30 pm

1 stop8h 40m

Ontario

Sat 1/30

12:00 pm-12:52 am

1 stop9h 52m

$397

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 10/21

11:30 am-7:35 pm

2 stops11h 05m

Ontario

Wed 10/28

6:10 am-4:55 pm

2 stops7h 45m

$407

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 9/9

5:40 pm-10:37 pm

1 stop7h 57m

Ontario

Sat 9/12

6:00 am-6:09 pm

1 stop9h 09m

$413

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Sun 9/6

7:55 am-1:50 pm

2 stops8h 55m

Ontario

Thu 9/10

11:00 am-10:00 pm

1 stop8h 00m

$418

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 9/9

3:52 pm-8:53 pm

1 stop8h 01m

Ontario

Sat 9/12

5:00 am-10:34 pm

2 stops14h 34m

$418

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Mon 10/5

6:18 pm-10:17 am

1 stop18h 59m

Ontario

Fri 10/9

6:02 am-5:15 pm

1 stop32h 13m

$425

MiamiOntario

MIA Miami - ONT Ontario

MIAONT

Miami

Wed 9/16

11:00 am-6:17 pm

2 stops10h 17m

Ontario

Sat 9/19

12:37 pm-11:59 pm

1 stop8h 22m

$487

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

Delays

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 $330 to $518.
The lowest price recently found on this route was $255.

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 August 2026, prices for Miami to Ontario flights are approximately 44% 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	$117
Fastest flight time	7h 10m
Direct flights	None

The best one-way flight to Ontario from Miami in the past 72 hours is $117. The best round-trip flight deal from Miami to Ontario found on momondo in the last 72 hours is $255.

The fastest flight from Miami to Ontario takes 7h 10m

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 10m 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 4 as of August 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 70% of all bookings. The subsequent popular airlines are Southwest at 12%, Delta at 9%, and Frontier at 9%.

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 $160	Free Cancellation	Rating 5.6 2,648 reviews	Search Frontier flights
American Airlines	PriceFrom $298	Free Cancellation	Rating 7.1 11,993 reviews	Search American Airlines flights
Southwest	PriceFrom $326	Free Cancellation	Rating 8.0 4,203 reviews	Search Southwest flights
Delta	PriceFrom $341	Free Cancellation	Rating 7.8 8,529 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 $117

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 9/24. 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

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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?

How often are flights from Miami to Ontario delayed?

What is the most punctual flight time for Miami to Ontario flights?

What day of the week experiences the fewest flight delays on this route?

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

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

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