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Ontario

$61+ Cheap flights from Miami to Ontario (MIA - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Miami to Ontario

Cheapest flights from Miami to Ontario
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 January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/21. 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 4/17:00 am
MIA
-
ONT
1 stop19h 56m
Multiple Airlines
Wed 4/85:18 pm
ONT
-
MIA
1 stop14h 28m
Multiple Airlines
Deal found 1/21$157
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Wed 2/115:45 am
MIA
-
ONT
1 stop30h 49m
Frontier
Sat 2/216:00 am
ONT
-
MIA
1 stop20h 14m
Frontier
Deal found 1/21$164
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/51:00 pm
MIA
-
ONT
1 stop26h 43m
Frontier
Mon 2/96:20 am
ONT
-
MIA
1 stop7h 17m
Frontier
Deal found 1/20$180
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Wed 3/46:25 am
MIA
-
ONT
1 stop18h 09m
Frontier
Mon 3/96:15 am
ONT
-
MIA
1 stop20h 23m
Frontier
Deal found 1/20$183
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Wed 2/115:45 am
MIA
-
ONT
1 stop18h 49m
Frontier
Wed 2/187:30 am
ONT
-
MIA
1 stop18h 44m
Frontier
Deal found 1/20$185
This CheapOair deal was found by Cheapflights users on 1/19. 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.
Tue 2/35:47 pm
MIA
-
ONT
1 stop24h 20m
Frontier
Tue 2/108:36 am
ONT
-
MIA
1 stop18h 12m
Frontier
Deal found 1/19$186
This Mytrip deal was found by Cheapflights users on 1/21. 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 2/245:45 am
MIA
-
ONT
1 stop18h 49m
Frontier
Wed 2/258:40 am
ONT
-
MIA
1 stop17h 34m
Frontier
Deal found 1/21$191
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Tue 3/315:50 am
MIA
-
ONT
1 stop21h 09m
Frontier
Tue 4/76:20 am
ONT
-
MIA
1 stop20h 29m
Frontier
Deal found 1/20$195
This CheapOair deal was found by Cheapflights users on 1/20. 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 1/291:00 pm
MIA
-
ONT
1 stop26h 43m
Frontier
Sat 2/77:15 am
ONT
-
MIA
1 stop6h 57m
Frontier
Deal found 1/20$201

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 January 21, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$157
(Kiwi.com)

One-way from

$61
(Trip.com)

Popular in

November

Cheapest in

February

Average price

$326
Provider with most accurate pricing for Miami-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Ontario flights.
Search Deals
From Miami to Ontario
Search Deals
One-way flight from Miami to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Miami to Ontario that are best for you.

Fly from

Miami

Fly to

Ontario

Route

Depart

Return

Price

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 2/3

5:47 pm-3:07 pm

1 stop24h 20m

Ontario

Tue 2/10

8:36 am-5:48 am

1 stop18h 12m

$186

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 2/3

5:47 pm-3:07 pm

1 stop24h 20m

Ontario

Sat 2/7

7:15 am-5:12 pm

1 stop6h 57m

$201

MiamiOntario

MIA - ONT

MIAONT

Miami

Sat 2/7

6:18 pm-11:24 pm

1 stop8h 06m

Ontario

Sat 2/14

6:00 am-5:14 am

1 stop20h 14m

$202

MiamiOntario

MIA - ONT

MIAONT

Miami

Sun 2/8

1:41 pm-12:43 pm

1 stop26h 02m

Ontario

Sat 2/14

6:00 am-5:14 am

1 stop20h 14m

$215

MiamiOntario

MIA - ONT

MIAONT

Miami

Sun 2/1

1:41 pm-12:43 pm

1 stop26h 02m

Ontario

Sat 2/7

7:15 am-5:12 pm

1 stop6h 57m

$235

MiamiOntario

MIA - ONT

MIAONT

Miami

Fri 2/27

10:17 pm-7:26 am

1 stop12h 09m

Ontario

Mon 3/2

6:10 am-5:14 am

1 stop20h 04m

$236

MiamiOntario

MIA - ONT

MIAONT

Miami

Sun 2/8

1:41 pm-12:43 pm

1 stop26h 02m

Ontario

Tue 2/17

8:35 am-5:14 am

1 stop17h 39m

$236

MiamiOntario

MIA - ONT

MIAONT

Miami

Sun 2/1

1:41 pm-12:43 pm

1 stop26h 02m

Ontario

Wed 2/4

7:15 am-8:59 pm

1 stop10h 44m

$256

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 2/11

5:45 am-9:34 am

1 stop30h 49m

Ontario

Sun 2/15

6:10 am-5:14 am

1 stop20h 04m

$259

MiamiOntario

MIA - ONT

MIAONT

Miami

Sat 2/21

6:25 am-11:59 pm

1 stop20h 34m

Ontario

Mon 2/23

6:10 am-5:48 am

1 stop20h 38m

$262

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 22 results
1
2
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Miami-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Miami-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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, March is the cheapest month in which you can book a flight from Miami to Ontario (average of $108). Flying from Miami to Ontario in July is currently the most expensive (average of $165). 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.

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 January 21, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines 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.
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,089 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • How long is the flight from Miami to Ontario?

    Frontier can get you from Miami to Ontario in just under 24h 20m. Your travel time can differ by up to . Airlines will cover a distance of 2291 mi.

  • What are the cheapest airlines flying from Miami to Ontario round-trip?

    Currently priced at $117, Frontier will fly you from Miami to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $253 and $298, respectively. Users have found that Frontier is 69% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Miami to Ontario one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $86. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from Miami to Ontario for a low price.

  • Can I find deals for flights from Miami to Ontario that include hotel bookings?

    Yes. In addition to deals on Miami to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Miami to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Miami to Ontario.

  • Can I find deals for business class flights from Miami to Ontario?

    Yes. Cheapflights offers flight deals from Miami to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Miami to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Miami to Ontario (average of $108). Flying from Miami to Ontario in July is currently the most expensive (average of $165). 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.

See more FAQs

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Alternative routes for Miami to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Miami to Ontario

Discover the top 5 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 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$117Average$276FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$481FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$382FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$326Average$508FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$336Average$436FlexibilityNo cancel feeOn-time69%

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