£121 Cheap Flights from Miami (MIA) to Ontario Intl. Airport (ONT)

View £121 flight on Wed, 17 Jun 2026Opens in a new window

Popular airlines from Miami International Airport (MIA) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Miami (MIA) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at £121 for one-way flights and £263 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, 29 May - Sat, 30 May
MIA
Miami
ONT
Ontario
£263 Return, found 2 days ago
£263
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Miami to Ontario, returning Sat, 30 May, priced at £263 found 2 days ago
American Airlines
Fri, 29 May - Sat, 30 May
MIA
Miami
ONT
Ontario
£264 Return, found 2 days ago
£264
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Miami to Ontario, returning Sat, 30 May, priced at £264 found 2 days ago
American Airlines
Fri, 29 May - Sat, 30 May
MIA
Miami
ONT
Ontario
£271 Return, found 2 days ago
£271
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Miami to Ontario, returning Sat, 30 May, priced at £271 found 2 days ago
Delta
Fri, 8 May - Fri, 15 May
MIA
Miami
ONT
Ontario
£279 Return, found 6 days ago
£279
Return
found 6 days ago
Select Delta flight, departing Fri, 8 May from Miami to Ontario, returning Fri, 15 May, priced at £279 found 6 days ago
American Airlines
Fri, 29 May - Sat, 30 May
MIA
Miami
ONT
Ontario
£293 Return, found 2 days ago
£293
Return
found 2 days ago
Select American Airlines flight, departing Fri, 29 May from Miami to Ontario, returning Sat, 30 May, priced at £293 found 2 days ago
Delta
Fri, 8 May - Fri, 15 May
MIA
Miami
ONT
Ontario
£295 Return, found 6 days ago
£295
Return
found 6 days ago
Select Delta flight, departing Fri, 8 May from Miami to Ontario, returning Fri, 15 May, priced at £295 found 6 days ago
Delta
Tue, 5 May - Wed, 13 May
MIA
Miami
ONT
Ontario
£305 Return, found 6 days ago
£305
Return
found 6 days ago
Select Delta flight, departing Tue, 5 May from Miami to Ontario, returning Wed, 13 May, priced at £305 found 6 days ago
Delta
Fri, 8 May - Fri, 15 May
MIA
Miami
ONT
Ontario
£308 Return, found 6 days ago
£308
Return
found 6 days ago
Select Delta flight, departing Fri, 8 May from Miami to Ontario, returning Fri, 15 May, priced at £308 found 6 days ago
Delta
Fri, 8 May - Fri, 15 May
MIA
Miami
ONT
Ontario
£309 Return, found 6 days ago
£309
Return
found 6 days ago
Select Delta flight, departing Fri, 8 May from Miami to Ontario, returning Fri, 15 May, priced at £309 found 6 days ago
United
Fri, 15 May - Tue, 2 Jun
MIA
Miami
ONT
Ontario
£334 Return, found 16 hours ago
£334
Return
found 16 hours ago
Select United flight, departing Fri, 15 May from Miami to Ontario, returning Tue, 2 Jun, priced at £334 found 16 hours ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Los Angeles - Ontario Intl. ONT. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £334
ONT
Los Angeles - Ontario Intl.
CheapestClosest
Average driving time to city centre8 min
Flights from £334

Frequently asked questions

What is the cheapest month to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
January is typically the cheapest month to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), with average return fares of approximately £266. This is about 15% lower than the average price throughout the year. January often sees lower prices because it falls after the busy holiday travel season, when demand tends to decrease and airlines offer more competitive fares. Other cheap months to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) include February and August.
How do I find cheap flights from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
To find a cheap flight from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The best time to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) for the best value is typically in January or August. You can expect return flights during these months to be around £266. These periods often see lower demand, allowing you to find more affordable fares.
How many flights per day from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
There are approximately 70 connecting flights per day from Miami Intl. (MIA) to Los Angeles - Ontario Intl. (ONT). Some common connection points include Dallas-Fort Worth Intl. (DFW), O'Hare Intl. (ORD), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The earliest flight from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in January, February, March, April, and December. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you're flying from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), you'll typically find the most flights on a Sunday, with around 54 flights available. This gives you plenty of options to choose from. Major airlines on this route include American Airlines, Alaska Airlines, and United Airlines. Flight schedules are fairly consistent throughout the week, with Sunday offering only slightly more flights than other days.
What are the most popular departure times for flights from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The most popular departure times for flights from Miami Intl. (MIA) to Los Angeles - Ontario Intl. (ONT) are in the morning, from 6am to 9am. About 36% of passengers prefer this time. Many major carriers, including American Airlines, Delta Air Lines and United Airlines, offer flights during this window. This timing works well because it allows you to start your travel early and arrive at your destination with plenty of time left in the day.
How long does it take to fly from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Flying from MIA to ONT with a connection usually takes about 8 hours, traveling roughly 2,293 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Select the "Business class" and "First class" filters when looking for MIA to ONT flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight with Expedia?
It's easy to earn miles on a Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Ontario from Miami Intl. (MIA)?
If you're planning to travel to Ontario from Miami Intl. (MIA), you can fly directly into Los Angeles - Ontario Intl. (ONT) Some flights may connect through major hubs like George Bush Intercontinental (IAH), Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) at the last minute?
Typically, booking a last minute flight from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package?
Securing a Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you booked your Miami, FL (MIA-Miami Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Miami Intl.
Destination airport
Ontario Intl. Airport
Airlines serving
American Airlines, Delta, United
Return price
£263
Distance
3667 km

Book with confidence

Compare flights from Miami to Ontario Intl. Airport easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Miami to Ontario Intl. Airport. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Ontario Intl. Airport in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Miami Intl. to Ontario Intl. Airport.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Miami Intl. (MIA) to Ontario Intl. Airport (ONT)

The easiest way to view the best deals on flights from Miami to Ontario Intl. Airport today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Miami Intl. to Ontario Intl. Airport start at just £263 and range up to £334.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Miami and Ontario Intl. Airport
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Miami to Ontario Intl. Airport flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Miami Intl. to Ontario Intl. Airport for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Miami to Ontario Intl. Airport easily and book with confidence

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*Available to Expedia members.