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$154+ Cheap flights from Ontario to Birmingham, AL (ONT - BHM)

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHM
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Ontario to Birmingham

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Birmingham (BHM). 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 15, 2025.

Round-trip from

$277
(Delta)

One-way from

$154
(Delta)

Popular in

November

Cheapest in

August

Average price

$411
From Ontario to Birmingham
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One-way flight from Ontario to Birmingham
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Highest demand for flights based on searches. 18% potential increase in price ($103 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 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 Ontario to Birmingham

Cheapest flights from Ontario to Birmingham
Explore the most affordable flight options available from Ontario to Birmingham. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:05 amONT - BHM
1 stop6h 10mDelta
Sat 11/85:24 amBHM - ONT
1 stop7h 02mDelta
Deal found 9/13$277
This Delta deal was found by Cheapflights users on 9/12. 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 10/1010:00 pmONT - BHM
1 stop8h 38mDelta
Fri 10/174:20 pmBHM - ONT
1 stop8h 02mDelta
Deal found 9/12$295
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 10/228:10 amONT - BHM
1 stop9h 30mSouthwest
Sat 10/2511:10 amBHM - ONT
1 stop6h 55mSouthwest
Deal found 9/14$307
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:02 amONT - BHM
1 stop7h 32mUnited Airlines
Sat 10/257:30 amBHM - ONT
2 stops12h 10mUnited Airlines
Deal found 9/14$312
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.
Mon 10/1310:00 pmONT - BHM
1 stop7h 59mDelta
Sat 10/185:24 amBHM - ONT
1 stop7h 02mDelta
Deal found 9/14$329
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.
Tue 12/239:00 pmONT - BHM
2 stops11h 40mSouthwest
Tue 12/305:00 pmBHM - ONT
2 stops8h 55mSouthwest
Deal found 9/14$333
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 11/156:00 amONT - BHM
2 stops8h 59mDelta
Mon 11/176:07 pmBHM - ONT
1 stop6h 57mDelta
Deal found 9/15$334
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.
Tue 10/1410:00 pmONT - BHM
1 stop7h 59mDelta
Tue 10/214:20 pmBHM - ONT
1 stop8h 02mDelta
Deal found 9/14$342
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.
Fri 10/1010:00 pmONT - BHM
1 stop8h 38mDelta
Sat 10/185:24 amBHM - ONT
1 stop7h 02mDelta
Deal found 9/14$343

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Birmingham 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 15, 2025.
Use the filters below to find and compare flights from Ontario to Birmingham that are best for you.

Fly from

Ontario

Fly to

Birmingham

Route

Depart

Return

Price

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 10/21

7:05 am-3:15 pm

1 stop6h 10m

Birmingham

Sat 11/8

5:24 am-10:26 am

1 stop7h 02m

$277

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/22

8:10 am-7:40 pm

1 stop9h 30m

Birmingham

Sat 10/25

11:10 am-4:05 pm

1 stop6h 55m

$307

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/22

6:00 am-4:20 pm

1 stop8h 20m

Birmingham

Sat 10/25

3:35 pm-8:24 pm

1 stop6h 49m

$307

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/22

8:10 am-7:40 pm

1 stop9h 30m

Birmingham

Fri 10/31

3:55 pm-7:55 pm

1 stop6h 00m

$307

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/22

2:51 pm-11:29 pm

1 stop6h 38m

Birmingham

Sat 10/25

7:38 am-3:24 pm

2 stops9h 46m

$312

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/15

10:00 pm-7:59 am

1 stop7h 59m

Birmingham

Sat 10/18

5:24 am-10:26 am

1 stop7h 02m

$329

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Mon 10/13

10:00 pm-7:59 am

1 stop7h 59m

Birmingham

Sat 10/18

5:24 am-10:26 am

1 stop7h 02m

$329

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Sat 11/15

7:05 am-5:06 pm

1 stop8h 01m

Birmingham

Mon 11/17

6:07 pm-11:04 pm

1 stop6h 57m

$329

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/15

10:00 pm-7:59 am

1 stop7h 59m

Birmingham

Tue 10/21

4:20 pm-10:22 pm

1 stop8h 02m

$329

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 11/11

5:05 am-1:55 pm

1 stop6h 50m

$199

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 Ontario to Birmingham

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

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $363). Flying from Ontario to Birmingham, Alabama in March is currently the most expensive (average of $457). 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 ONT to BHM?

Find hourly flight availability from Ontario to Birmingham. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

It’s typically best to fly out from Ontario to Birmingham, Alabama at noon. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Birmingham

Get insights into the airlines that provide service to Birmingham. 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 Birmingham. Reviews last updated September 15, 2025.
Read through reviews of airlines operating flights from Ontario to Birmingham, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

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 Ontario to Birmingham. 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 Ontario to Birmingham, Alabama?

    Airlines like Delta, Southwest, and United Airlines fly from Ontario to Birmingham, Alabama in about 6h 10m. The time it takes to get you to your destination can typically vary by up to 3h 20m. Ontario and Birmingham, Alabama are separated by a distance of 1763 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Ontario to Birmingham, Alabama round-trip from $276. Other airlines that can offer you cheap pricing are American Airlines, from $339, and Southwest, from $356. These flights start at 39% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $363). Flying from Ontario to Birmingham, Alabama in March is currently the most expensive (average of $457). 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

Traveling to a place near Birmingham?

Book flights to Birmingham if you plan to visit one of these locations
Homewood
Bessemer
Hoover

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Top 3 airlines flying from Ontario to Birmingham

Discover the top 3 airlines that operate flights from Ontario to Birmingham. 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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$276Average$402FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$339Average$416FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$356Average$465FlexibilityNo cancel feeOn-time63%

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