$153 Cheap United flights from Miami to Ontario (MIA to ONT)

Find The Best Day To Fly from Miami to Ontario

Amazing United MIA to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $382 round trip and $153 one way. Prices and availability subject to change. Additional terms may apply.

ONT From MIA Economy Coach Packages on Similar Airlines

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Frequently asked questions

Can I catch a flight from MIA to Los Angeles - Ontario Intl. Airport (ONT) right now?
For information on any present Los Angeles - Ontario Intl. Airport (ONT) travel advice and quarantine requirements, visit our Covid-19 Travel Advisor. Check before you arrange your flight, so you don't get caught out.
What terminal is United Airlines at Miami Airport?
Check your boarding pass to find out which Miami Airport terminal you'll be taking off from on your way to ONT with United Airlines. If you can't locate the details on there, consult your airline.
Are there United Airlines non-stop flights from MIA to ONT?
As you can't travel direct from MIA to ONT with United Airlines, make the most of your stopover. Grab a few drinks at a nice airport bar, or go for a wander around the terminal and enjoy some retail therapy.
How long is a United Airlines flight from MIA to ONT?
Enjoy an in-flight snooze and start your vacation feeling relaxed. You'll have time to do so when traveling with United Airlines between Miami Intl. Airport (MIA) and ONT, with the flight taking about 8 hours and 4 minutes.
How many direct and indirect flights does United Airlines fly from MIA to ONT?
The path is well traveled from Miami Intl. Airport (MIA) to ONT. United Airlines connects the two approximately 7 times each week.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Ontario Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Miami MIA to Ontario ONT 

To find the best deals on flights to Miami from Ontario with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Miami MIA to Ontario ONT with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $382 to $382, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Miami MIA to Ontario ONT 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Miami to Ontario costs from $153. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Ontario ONT from  Miami MIA with United 

To find a cheap United flight from Miami MIA to Ontario ONT, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Miami MIA to Ontario ONT 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as July, or if you book a flight with a stopover. 

 

Find nonstop flights from Miami MIA to Ontario ONT with United 

If you’re keen to be on Ontario soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Miami MIA to Ontario ONT 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Ontario ONT from  Miami MIA with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Ontario

Ontario Airport Inn
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3 out of 5
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This hotel features a restaurant, a gym, and a bar/lounge. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public areas, and ...
8.4/10 Very Good! (1,177 reviews)
Overall good stay
"We had a good stay. Although our backs and necks woke up super sore. Our stay was planned for 2 people and we only had one washcloth available. The coffee station in the lobby when we arrived back from dinner was covered with cups and water bottles just left by other guests."

Reviewed on Jun 29, 2025

Holiday Inn Ontario Airport by IHG
Azure Hotel & Suites, Trademark Collection by Wyndham
Azure Hotel & Suites, Trademark Collection by Wyndham
3 out of 5
1945 E. Holt Blvd, Ontario, CA
This hotel features a restaurant, a gym, and a bar/lounge. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public areas. ...
8.4/10 Very Good! (1,874 reviews)
Great room at a good price
"Great room and good price"

Reviewed on Jun 29, 2025

Azure Hotel & Suites, Trademark Collection by Wyndham
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.