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Cheap flights from Miami to Ontario from $66

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 Ontario departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Miami to Ontario

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:42 am - 6:49 pm
MIA
-
ONT
13h 07m
1 stop
Frontier Logo
7:44 pm - 7:22 am
ONT
-
MIA
8h 38m
1 stop
$199Frontier
mié., abr. 15 - mar., abr. 21
Frontier Logo
8:42 am - 6:49 pm
MIA
-
ONT
13h 07m
1 stop
Frontier Logo
6:15 am - 10:07 pm
ONT
-
MIA
12h 52m
1 stop
$200Frontier
mié., abr. 22 - dom., abr. 26
Frontier Logo
10:39 am - 6:45 pm
MIA
-
ONT
11h 06m
1 stop
Frontier Logo
7:44 pm - 7:32 am
ONT
-
MIA
8h 48m
1 stop
$201Frontier
jue., abr. 9 - mié., abr. 15
Frontier Logo
10:39 am - 6:45 pm
MIA
-
ONT
11h 06m
1 stop
Frontier Logo
6:20 am - 5:49 am
ONT
-
MIA
20h 29m
1 stop
$202Frontier
jue., abr. 9 - lun., abr. 13
Frontier Logo
7:00 am - 11:56 pm
MIA
-
ONT
19h 56m
1 stop
Frontier Logo
7:44 pm - 7:22 am
ONT
-
MIA
8h 38m
1 stop
$206Frontier
mar., abr. 7 - mar., abr. 14
Frontier Logo
7:00 am - 11:56 pm
MIA
-
ONT
19h 56m
1 stop
Frontier Logo
7:44 pm - 7:22 am
ONT
-
MIA
8h 38m
1 stop
$207Frontier
mar., abr. 7 - mar., abr. 14
Frontier Logo
7:50 am - 11:55 pm
MIA
-
ONT
19h 05m
1 stop
Frontier Logo
12:59 am - 5:05 am
ONT
-
MIA
25h 06m
1 stop
$211Frontier
mar., may. 5 - sáb., may. 9
Frontier Logo
7:00 am - 11:56 pm
MIA
-
ONT
19h 56m
1 stop
Frontier Logo
12:59 am - 5:48 am
ONT
-
MIA
25h 49m
1 stop
$213Frontier
mar., abr. 7 - mar., may. 26
Frontier Logo
8:42 am - 6:34 pm
MIA
-
ONT
12h 52m
1 stop
Frontier Logo
5:33 pm - 5:05 am
ONT
-
MIA
8h 32m
1 stop
$216Frontier
mar., may. 5 - lun., may. 18
Frontier Logo
10:39 am - 6:45 pm
MIA
-
ONT
11h 06m
1 stop
Frontier Logo
11:44 am - 7:32 am
ONT
-
MIA
16h 48m
1 stop
$220Frontier
jue., abr. 9 - mié., abr. 15

Frontier flights from Miami to Ontario

Our best Frontier deals on Miami to Ontario flight tickets
Frontier
Apr 15
MIA8:42 amMiami
13h 07m
1 stop
ONT6:49 pmOntario
Apr 21
ONT7:44 pmOntario
8h 38m
1 stop
MIA7:22 amMiami
$199
Frontier
Apr 22
MIA8:42 amMiami
13h 07m
1 stop
ONT6:49 pmOntario
Apr 26
ONT6:15 amOntario
12h 52m
1 stop
MIA10:07 pmMiami
$200
Frontier
Apr 9
MIA10:39 amMiami
11h 06m
1 stop
ONT6:45 pmOntario
Apr 15
ONT7:44 pmOntario
8h 48m
1 stop
MIA7:32 amMiami
$201

Delta flights from Miami to Ontario

Our best Delta deals on Miami to Ontario flight tickets
Delta
Mar 24
MIA6:55 amMiami
8h 28m
1 stop
ONT12:23 pmOntario
Mar 24
ONT5:09 pmOntario
9h 31m
1 stop
MIA5:40 amMiami
$357
Delta
Mar 18
MIA6:55 amMiami
8h 28m
1 stop
ONT12:23 pmOntario
Mar 24
ONT12:57 pmOntario
8h 55m
1 stop
MIA12:52 amMiami
$397
Delta
Mar 17
MIA3:33 pmMiami
8h 27m
1 stop
ONT9:00 pmOntario
Mar 18
ONT5:09 pmOntario
9h 31m
1 stop
MIA5:40 amMiami
$437

momondo Fare Finder

 
Customize your flight search to find flights from Miami to Ontario 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, momondo users made 832,500 searches. Data last updated marzo 10, 2026.
Use the filters below to find and compare flights from Miami to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 4/15

8:42 am-6:49 pm

1 stop13h 07m

Ontario

mar. 4/21

7:44 pm-7:22 am

1 stop8h 38m

$199

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 4/22

8:42 am-6:49 pm

1 stop13h 07m

Ontario

dom. 4/26

6:15 am-10:07 pm

1 stop12h 52m

$200
Quickest round-trip

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 4/9

10:39 am-6:45 pm

1 stop11h 06m

Ontario

mié. 4/15

7:44 pm-7:32 am

1 stop8h 48m

$201

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 4/9

10:39 am-6:45 pm

1 stop11h 06m

Ontario

lun. 4/13

6:20 am-5:49 am

1 stop20h 29m

$202

MiamiOntario

MIA - ONT

MIAONT

Miami

mar. 4/7

7:00 am-11:56 pm

1 stop19h 56m

Ontario

mar. 4/14

7:44 pm-7:22 am

1 stop8h 38m

$206

MiamiOntario

MIA - ONT

MIAONT

Miami

mar. 4/7

7:00 am-11:56 pm

1 stop19h 56m

Ontario

mar. 4/14

7:44 pm-7:22 am

1 stop8h 38m

$207

MiamiOntario

MIA - ONT

MIAONT

Miami

mar. 5/5

7:50 am-11:55 pm

1 stop19h 05m

Ontario

sáb. 5/9

12:59 am-5:05 am

1 stop25h 06m

$211

MiamiOntario

MIA - ONT

MIAONT

Miami

mar. 4/7

7:00 am-11:56 pm

1 stop19h 56m

Ontario

mar. 5/26

12:59 am-5:48 am

1 stop25h 49m

$213

MiamiOntario

MIA - ONT

MIAONT

Miami

mar. 5/5

8:42 am-6:34 pm

1 stop12h 52m

Ontario

lun. 5/18

5:33 pm-5:05 am

1 stop8h 32m

$216

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 4/9

10:39 am-6:45 pm

1 stop11h 06m

Ontario

mié. 4/15

11:44 am-7:32 am

1 stop16h 48m

$220

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ontario from

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

What is the cheapest month to fly to Ontario?

In general, August 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 $336. If you aren’t able to travel during the month of August, then book flights to Ontario from Miami during February instead. Flights to Ontario in February, while not as cheap as those in August, still average around $347.

How have Miami to Ontario flight prices changed over time?

As of March 2026, prices for Miami to Ontario flights are approximately 38% cheaper 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

Fastest flight time

6h 59m

Direct flights

None
The fastest flight from Miami to Ontario takes 6h 59m
There are no direct flights from Miami to Ontario. There are no popular flight routes from Miami to Ontario.
Search flight deals

  • How far is Miami to Ontario by plane?

    A flight from Miami to Ontario will travel around 2299.8 mi. 6h 59m 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?

  • 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?

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
American AirlinesPriceFrom $298Free CancellationRating
7.1
11,410 reviews
Search American Airlines flights
SouthwestPriceFrom $326Free CancellationRating
8.0
4,318 reviews
Search Southwest flights
United AirlinesPriceFrom $336Free CancellationRating
7.4
9,409 reviews
Search United Airlines 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

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