$121+ Cheap flights from Miami to Ontario (MIA - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from Miami to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Miami to Ontario
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Best
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One-way
Cheapest flights from Miami to OntarioExplore the most affordable flight options available from Miami to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from Miami to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This Mytrip deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:55 pm -
2 stops14h 40m
Sat 10/3111:52 am -
2 stops20h 37m
Deal found 9/25![Frontier logo]()
$269
This Mytrip deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
1 stop7h 39m
Sat 10/3111:52 am -
2 stops20h 37m
Deal found 9/27![Frontier logo]()
$272
This Frontier deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
1 stop7h 39m
Sat 10/245:33 pm -
1 stop12h 19m
Deal found 9/28![Frontier logo]()
$278
This Booking.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:50 am -
1 stop21h 01m
Thu 10/2911:52 am -
1 stop9h 52m
Deal found 9/27![Frontier logo]()
$284
This Trip.com deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:50 am -
1 stop7h 45m
Sat 11/711:52 am -
1 stop9h 52m
Deal found 9/26![Frontier logo]()
$285
This CheapOair deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:47 am -
1 stop12h 18m
Tue 10/276:25 am -
1 stop15h 19m
Deal found 9/28![Frontier logo]()
$288
Best flights from Miami to OntarioDiscover carefully curated flight deals from Miami to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from Miami to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This CheapOair deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/49:08 pm -
2 stops28h 09m
Mon 12/76:00 am -
2 stops51h 42m
Deal found 9/23![Frontier logo]()
$373
This Delta deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:04 am -
1 stop8h 02m
Sat 10/245:03 pm -
1 stop10h 19m
Deal found 9/27![Delta logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:18 pm -
2 stops24h 44m
Mon 10/266:56 pm -
1 stop19h 19m
Deal found 9/23![Alaska Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:15 am -
1 stop11h 41m
Wed 12/25:45 am -
1 stop9h 30m
Deal found 9/28![United Airlines logo]()
$527
This Delta deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:55 am -
1 stop8h 41m
Sun 11/811:05 pm -
1 stop7h 24m
Deal found 9/25![Delta logo]()
$437
This Delta deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:04 am -
1 stop8h 02m
Sat 10/3112:16 pm -
1 stop9h 37m
Deal found 9/27![Delta logo]()
$449
This Alaska Airlines deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/104:51 pm -
1 stop10h 03m
Wed 1/611:36 am -
1 stop26h 31m
Deal found 9/26![Alaska Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:04 am -
1 stop8h 02m
Sat 10/2412:16 pm -
1 stop9h 37m
Deal found 9/24![Delta logo]()
$538
This Delta deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:04 am -
1 stop8h 02m
Mon 10/1911:08 pm -
1 stop8h 52m
Deal found 9/24![Delta logo]()
$538
Last-minute flights from Miami to OntarioDiscover last-minute flight deals from Miami to Ontario. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from Miami to Ontario. Data last updated September 28, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:47 am -
1 stop12h 18m
Tue 10/276:25 am -
1 stop15h 19m
Deal found 9/28![Frontier logo]()
$288
This Mytrip deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
1 stop7h 39m
Sat 10/3111:52 am -
2 stops20h 37m
Deal found 9/27![Frontier logo]()
$272
This Mytrip deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
1 stop7h 39m
Wed 10/2811:52 am -
2 stops19h 37m
Deal found 9/26![Frontier logo]()
$289
This Mytrip deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:55 pm -
2 stops14h 40m
Sat 10/3111:52 am -
2 stops20h 37m
Deal found 9/25![Frontier logo]()
$269
This Booking.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:50 am -
1 stop21h 01m
Thu 10/2911:52 am -
1 stop9h 52m
Deal found 9/27![Frontier logo]()
$284
One-way flights from Miami to OntarioSearch for one-way flight options from Miami to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
Search for one-way flight options from Miami to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/810:54 am -
2 stops38h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:49 am -
2 stops26h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$122
This Mytrip deal was found by Cheapflights users on 9/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:36 pm -
2 stops14h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$127
This Mytrip deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:55 pm -
2 stops14h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$129
This Mytrip deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:55 pm -
2 stops14h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$131
This Cheapflightsfares deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:50 am -
1 stop7h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$137
This Flightnetwork deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:50 am -
1 stop7h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$138
This Booking.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:50 am -
1 stop7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$139
This Mytrip deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:55 pm -
2 stops14h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$140
This Super.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:47 am -
1 stop12h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Frontier logo]()
$142
Find flight deals from Miami to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Miami (MIA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $269 (Mytrip) |
One-way from | $121 (Kiwi.com) |
Popular in | August |
Cheapest in | June |
Average price | $416 |
Cheapflights 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, Cheapflights users made 7,457,451 searches. Data last updated September 28, 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
Cheapest round-trip
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Sat 1/23
6:00 am-11:27 am
1 stop8h 27m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Mon 12/21
1:56 pm-10:38 pm
2 stops11h 42m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$204
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Fri 12/25
7:30 am-3:05 pm
1 stop10h 35m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$213
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Mon 2/8
6:43 pm-11:48 pm
1 stop8h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Wed 10/21
6:55 am-12:36 pm
1 stop8h 41m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Tue 10/20
4:01 pm-10:49 pm
1 stop9h 48m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$264
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Thu 10/8
4:01 pm-10:49 pm
1 stop9h 48m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$269
Quickest round-trip
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Fri 10/16
6:04 am-11:06 am
1 stop8h 02m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$269
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Sat 10/10
7:00 am-4:00 pm
2 stops12h 00m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$274
MiamiOntario
MIA Miami - ONT Ontario
MIAONT
Miami
Tue 10/27
12:50 pm-8:51 pm
2 stops11h 01m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$286
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Miami to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Miami to Ontario in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Miami-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Miami-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Miami-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Miami-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Miami-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Miami to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Miami with our price prediction graph.
MIA-ONT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Miami to Ontario
What is the cheapest month to book a flight from Miami to Ontario?
Currently, June is the cheapest month in which you can book a flight from Miami to Ontario (average of $341). Flying from Miami to Ontario in August is currently the most expensive (average of $576). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Miami to Ontario?
Airfare is below average for this route at the moment.
Miami to Ontario flights typically cost between $294 and $446 in October.The cheapest round-trip price found within the last 5 days was $269 on Frontier (Oct 26-Oct 31).
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 28, 2026.
Read reviews from past customers who have flown Southwest,American Airlines, andFrontier from Miami to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Miami to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
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Ontario flight routes
Other flight options
Other flights from Miami
Popular flights
Alternative routes for Miami to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Miami to Ontario by cabin class
Find flights from Miami to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
Miami and Ontario flights
Browse other Miami and Ontario flight options. Last updated on September 28, 2026.
Other flights from Miami
Browse through other flights departing from Miami. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Miami to Ontario
Discover the top 3 airlines that operate flights from Miami to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$165 | Average$278 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$306 | Average$416 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$326 | Average$508 | FlexibilityNo cancel fee | On-time63% |