MIA - ONT

$63 Find Cheap Flights from Miami to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Miami to Ontario departing on 2/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Miami to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Miami to Ontario, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$164
Overall average: $322
Frontier
Wed 2/11Sat 2/21
MIA - ONT • 1 stop
Cheapest one-way
$61
Typical prices: $209-$375
Frontier
Fri 2/20
MIA - ONT • 1 stop
Top airlines
Frontier
Cheapest • from $164 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 17% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Miami to Ontario (MIA-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Miami to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Miami to Ontario

Wed, Feb 11 - Sat, Feb 21
Frontier Logo
5:45 am - 9:34 am
MIA
-
ONT
30h 49m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$164Frontier
Sat, Feb 14 - Sat, Feb 21
Frontier Logo
6:25 am - 11:59 pm
MIA
-
ONT
20h 34m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$166Frontier
Wed, Feb 11 - Wed, Feb 25
Frontier Logo
5:45 am - 9:34 pm
MIA
-
ONT
18h 49m
1 stop
Frontier Logo
8:40 am - 5:14 am
ONT
-
MIA
17h 34m
1 stop
$180Frontier
Wed, Feb 18 - Sat, Feb 21
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$185Frontier
Thu, Feb 5 - Sat, Feb 14
Frontier Logo
1:00 pm - 12:43 pm
MIA
-
ONT
26h 43m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$192Frontier
Thu, Feb 5 - Sat, Feb 14
Frontier Logo
1:00 pm - 12:43 pm
MIA
-
ONT
26h 43m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$193Frontier
Wed, Feb 11 - Sat, Feb 21
Frontier Logo
5:45 am - 1:11 pm
MIA
-
ONT
34h 26m
2 stops
Frontier Logo
8:21 am - 10:23 am
ONT
-
MIA
23h 02m
1 stop
$198Frontier
Tue, Mar 3 - Sat, Mar 7
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
Frontier Logo
6:15 am - 4:49 am
ONT
-
MIA
19h 34m
1 stop
$199Frontier
Sat, Feb 7 - Tue, Feb 10
Frontier Logo
6:18 pm - 11:24 pm
MIA
-
ONT
8h 06m
1 stop
Frontier Logo
8:36 am - 5:48 am
ONT
-
MIA
18h 12m
1 stop
$201Frontier
Sat, Feb 7 - Sat, Feb 14
Frontier Logo
6:18 pm - 11:24 pm
MIA
-
ONT
8h 06m
1 stop
Frontier Logo
6:00 am - 5:14 am
ONT
-
MIA
20h 14m
1 stop
$202Frontier
Booking Insights

KAYAK's insights & trends for Miami to Ontario flights

Get data-powered insights and trends into flights from Miami to Ontario to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Miami to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Miami to Ontario is February, where tickets cost $322 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $508 and $417 respectively.

Good to know

Low seasonFebruary
Cheapest flight$61
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Miami to Ontario

When to book flights from Miami to Ontario

Are your dates flexible? Find out the best times to travel from Miami to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Miami to Ontario

  • What is the cheapest flight from Miami to Ontario?

    In the last 3 days, the lowest price for a flight from Miami to Ontario was $63 for a one-way ticket and $164 for a round-trip.

  • Do I need a passport to fly between Miami and Ontario?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Miami to Ontario?

    Miami and Ontario are both served by 1 main airport. You will leave Miami from Miami and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Miami to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Miami to Ontario?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Miami and Ontario, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Miami to Ontario, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Miami to Ontario are Southwest and Delta. With an average price for the route of $508 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $481 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Miami to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Miami to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Miami to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Miami is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Miami to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Miami with another airline. Booking your flights between Miami and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Miami to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Miami up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Miami to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Miami to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Miami to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4268 reviews
8.1Boarding
7.5Entertainment
7.0Food
8.0Comfort
8.6Crew
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

Amazing I love American. I’ll never fly anyone else if I can help it.

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

We were 4+ hours delayed. AA is absolutely obnoxious. They just kept pushing back the time to the point where we did not get into Vegas until after midnight when we were supposed to arrive like 845pm.

My last flight on 25 Dec, it’s Christmas Day, everyone happy and very good mood. I really enjoy traveling with Americans Airlines from Miami to Minneapolis my home town after long flight from lhe to Doha then Miami. Thank you again to make my travels comfortable and relaxed. Best regards

I like that the crew kept us informed but we moved back and forth from gate to gate before the aircraft arrived.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

Food was ok, but not as good as I have had before on AA.

Pretty good. The food was just mediocre, the boarding and crew were good.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

This company socks. It's fraud. They canceled our flight yesterday, and today we were late because of a really long line at the check in bag. At the rebook station, there was ton of people. The workers were all rude. I am gonna make a report to FTC.

Flight got delayed for 5 hours no good explanation was offered ;(

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

Everything you need to know for your flight from Miami to Ontario

Information on your arrival and departure airports