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$128+ Cheap flights from Birmingham, AL to Ontario (BHM - 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BHM — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Birmingham to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Birmingham (BHM) 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 16, 2025.

Round-trip from

$309
(American Airlines)

One-way from

$128
(American Airlines)

Popular in

September

Cheapest in

February

Average price

$726
From Birmingham to Ontario
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One-way flight from Birmingham to Ontario
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Highest demand for flights based on searches. 16% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Birmingham to Ontario

Cheapest flights from Birmingham to Ontario
Explore the most affordable flight options available from Birmingham to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Southwest deal was found by Cheapflights users on 9/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/222:30 pmBHM - ONT
1 stop6h 00mSouthwest
Mon 10/272:15 pmONT - BHM
1 stop7h 25mSouthwest
Deal found 9/13$329
This Delta deal was found by Cheapflights users on 9/15. 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 10/112:23 pmBHM - ONT
1 stop6h 56mDelta
Fri 10/1710:00 pmONT - BHM
1 stop8h 38mDelta
Deal found 9/15$343
This Delta deal was found by Cheapflights users on 9/16. 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 12/235:24 pmBHM - ONT
1 stop7h 35mDelta
Tue 12/3010:29 pmONT - BHM
1 stop8h 22mDelta
Deal found 9/16$351
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 12/246:07 amBHM - ONT
2 stops12h 00mAmerican Airlines
Thu 1/110:40 pmONT - BHM
1 stop7h 06mAmerican Airlines
Deal found 9/14$352
This Southwest deal was found by Cheapflights users on 9/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:25 amBHM - ONT
1 stop9h 50mSouthwest
Thu 1/15:25 amONT - BHM
1 stop5h 25mSouthwest
Deal found 9/14$377
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:45 amBHM - ONT
1 stop6h 20mSouthwest
Sun 12/214:05 pmONT - BHM
1 stop6h 20mSouthwest
Deal found 9/16$392
This Delta deal was found by Cheapflights users on 9/14. 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 11/136:07 pmBHM - ONT
1 stop6h 57mDelta
Sun 11/1610:25 pmONT - BHM
1 stop7h 38mDelta
Deal found 9/14$394
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 11/88:00 amBHM - ONT
1 stop6h 33mUnited Airlines
Tue 11/111:33 pmONT - BHM
1 stop5h 47mUnited Airlines
Deal found 9/16$397
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 11/58:00 amBHM - ONT
1 stop6h 31mUnited Airlines
Wed 11/125:05 amONT - BHM
2 stops13h 16mUnited Airlines
Deal found 9/16$402

Cheapflights Fare Finder

 
Customize your flight search to find flights from Birmingham 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 September 16, 2025.
Use the filters below to find and compare flights from Birmingham to Ontario that are best for you.

Fly from

Birmingham

Fly to

Ontario

Route

Depart

Return

Price

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 10/22

2:30 pm-6:30 pm

1 stop6h 00m

Ontario

Mon 10/27

2:15 pm-11:40 pm

1 stop7h 25m

$329

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 10/11

2:23 pm-7:19 pm

1 stop6h 56m

Ontario

Fri 10/17

10:00 pm-8:38 am

1 stop8h 38m

$343

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 12/13

5:45 am-10:05 am

1 stop6h 20m

Ontario

Sun 12/21

4:05 pm-12:25 am

1 stop6h 20m

$392

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 11/13

6:07 pm-11:04 pm

1 stop6h 57m

Ontario

Sun 11/16

10:25 pm-8:03 am

1 stop7h 38m

$394

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 11/8

3:30 pm-8:44 pm

1 stop7h 14m

Ontario

Tue 11/11

5:05 am-1:55 pm

1 stop6h 50m

$397

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 11/5

8:00 am-12:31 pm

1 stop6h 31m

Ontario

Wed 11/12

5:05 am-8:21 pm

2 stops13h 16m

$402

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 10/11

11:16 am-6:52 pm

2 stops9h 36m

Ontario

Fri 10/17

10:29 pm-8:32 am

1 stop8h 03m

$405

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 9/30

5:54 pm-10:23 pm

1 stop6h 29m

Ontario

Tue 10/7

10:00 pm-7:59 am

1 stop7h 59m

$422

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 9/30

5:23 am-10:42 am

1 stop7h 19m

Ontario

Sat 10/18

11:36 am-10:34 pm

1 stop8h 58m

$422

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 12/6

3:25 pm-8:42 pm

1 stop7h 17m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 20 results
1
2

Best time to book a flight from Birmingham to Ontario

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

What is the cheapest month to book a flight from Birmingham, Alabama to Ontario?

Currently, August is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $246). Flying from Birmingham, Alabama to Ontario in March is currently the most expensive (average of $327). 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.

What is the cheapest time of day to fly from BHM to ONT?

Find hourly flight availability from Birmingham to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s typically best to fly out from Birmingham, Alabama to Ontario in the afternoon. Doing so could potentially save you 5% on the flight price compared to flying in the evening, which is usually more expensive.

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 16, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and American Airlines from Birmingham to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

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
8.0
Very good
7,957 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

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
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Crew

8.6

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 Birmingham 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 Birmingham, Alabama to Ontario?

    Airlines like Southwest and Delta fly from Birmingham, Alabama to Ontario in about 6h. The time it takes to get you to your destination can typically vary by up to 56m. The distance between Birmingham, Alabama and Ontario is about 1763 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Birmingham, Alabama to Ontario round-trip?

    Cheapflights users have booked flights from Birmingham, Alabama to Ontario round-trip from $286. Other airlines that can offer you cheap pricing are American Airlines, from $361, and Southwest, from $366. Users have found that Delta is 40% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Birmingham, Alabama to Ontario one-way?

    One-way options have recently been found by users for as low as $154 on United Airlines. Other airlines that offer cheap prices include Southwest from $154 and Delta from $159 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Birmingham 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 Birmingham, Alabama to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $246). Flying from Birmingham, Alabama to Ontario in March is currently the most expensive (average of $327). 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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Top 3 airlines flying from Birmingham to Ontario

Discover the top 3 airlines that operate flights from Birmingham 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$286Average$402FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$361Average$456FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$366Average$466FlexibilityNo cancel feeOn-time63%

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