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$317+ Cheap flights from Montgomery to Ontario (MGM - 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
MGM — ONT
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Cheap flight deals from Montgomery to Ontario

Cheapest flights from Montgomery to Ontario
Explore the most affordable flight options available from Montgomery to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.

This Delta deal was found by Cheapflights users on 7/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:30 pm
MGM
-
ONT
1 stop8h 00m
Delta
Sun 8/2310:00 pm
ONT
-
MGM
1 stop9h 12m
Delta
Deal found 7/20$338
This United Airlines deal was found by Cheapflights users on 7/18. 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.
Thu 9/34:53 pm
MGM
-
ONT
1 stop7h 06m
United Airlines
Sun 9/66:00 am
ONT
-
MGM
1 stop8h 17m
United Airlines
Deal found 7/18$394
This Delta deal was found by Cheapflights users on 7/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:00 am
MGM
-
ONT
1 stop6h 42m
Delta
Sun 9/612:00 pm
ONT
-
MGM
1 stop6h 14m
Delta
Deal found 7/21$413
This Delta deal was found by Cheapflights users on 7/22. 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.
Thu 8/612:30 pm
MGM
-
ONT
1 stop8h 00m
Delta
Mon 8/1012:00 pm
ONT
-
MGM
1 stop9h 08m
Delta
Deal found 7/22$418
This United Airlines deal was found by Cheapflights users on 7/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/244:53 pm
MGM
-
ONT
1 stop7h 06m
United Airlines
Mon 9/286:00 am
ONT
-
MGM
1 stop8h 17m
United Airlines
Deal found 7/20$438
This United Airlines deal was found by Cheapflights users on 7/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:53 pm
MGM
-
ONT
1 stop7h 06m
United Airlines
Mon 8/246:00 am
ONT
-
MGM
1 stop8h 17m
United Airlines
Deal found 7/21$448
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:14 pm
MGM
-
ONT
1 stop6h 45m
American Airlines
Thu 8/1312:33 pm
ONT
-
MGM
1 stop7h 58m
American Airlines
Deal found 7/19$468
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Thu 8/64:51 pm
MGM
-
ONT
1 stop7h 04m
United Airlines
Fri 8/146:00 am
ONT
-
MGM
1 stop8h 17m
United Airlines
Deal found 7/17$473

Find flight deals from Montgomery to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Montgomery (MGM) 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 July 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$338
(Delta)

One-way from

$317
(United Airlines)

Popular in

September

Cheapest in

November

Average price

$433
Provider with most accurate pricing for Montgomery Dannelly Field-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Montgomery Dannelly Field-Ontario flights.
Search Deals
From Montgomery Dannelly Field to Ontario
Search Deals
One-way flight from Montgomery Dannelly Field to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montgomery 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 July 23, 2026.
Use the filters below to find and compare flights from Montgomery to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Thu 9/3

4:53 pm-9:59 pm

1 stop7h 06m

Ontario

Sun 9/6

5:00 am-4:17 pm

2 stops9h 17m

$399

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Thu 8/6

4:51 pm-9:55 pm

1 stop7h 04m

Ontario

Thu 8/13

5:00 am-4:17 pm

2 stops9h 17m

$479
Quickest round-trip

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Sat 8/22

1:17 pm-6:12 pm

1 stop6h 55m

Ontario

Tue 8/25

5:00 am-4:17 pm

2 stops9h 17m

$489

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Sat 8/29

1:17 pm-6:12 pm

1 stop6h 55m

Ontario

Tue 9/1

9:15 am-12:41 pm

1 stop25h 26m

$525

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Thu 9/24

4:53 pm-9:59 pm

1 stop7h 06m

Ontario

Tue 9/29

1:52 pm-12:41 pm

2 stops20h 49m

$531

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Thu 8/6

4:51 pm-9:55 pm

1 stop7h 04m

Ontario

Sat 8/8

5:00 am-4:16 pm

2 stops9h 16m

$559
Cheapest one-way

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Tue 8/18

1:17 pm-8:01 pm

2 stops32h 44m

$317
Quickest one-way

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Tue 8/18

2:42 pm-7:53 pm

1 stop7h 11m

$368

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Tue 8/4

1:20 pm-8:42 pm

2 stops9h 22m

$438

MontgomeryOntario

MGM - ONT

MGMONT

Montgomery Dannelly Field

Wed 8/5

1:20 pm-8:42 pm

2 stops9h 22m

$438

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 11 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Montgomery-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Montgomery-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Montgomery-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Montgomery-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 Montgomery-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 Montgomery to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Montgomery 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 Montgomery to Ontario

How much does it cost to fly round-trip from Montgomery to Ontario?

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 July 23, 2026.
See what other customers who have flown with Delta and American Airlines from Montgomery to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,479 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.8
Good
8,479 reviews
Delta
7.8
Good
8,479 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.1
Good
11,832 reviews
Delta
7.8
Good
8,479 reviews

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Montgomery 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 Montgomery to Ontario?

    For as low as $399, United Airlines can have you in Ontario from Montgomery in 7h 06m. The distance between Montgomery and Ontario is about 1800 mi.

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

    Currently priced at $298, Delta will fly you from Montgomery to Ontario and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $338. Users have found that Delta is 46% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montgomery 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.

See more FAQs

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Alternative routes for Montgomery to Ontario

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Top 2 airlines flying from Montgomery to Ontario

Discover the top 2 airlines that operate flights from Montgomery 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 July 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$298Average$536FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$338Average$585FlexibilityNo cancel feeOn-time71%

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