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$149+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHM
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$277
(Delta)

One-way from

$149
(Delta)

Popular in

November

Cheapest in

August

Average price

$374
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. 13% potential increase in price ($70 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 August 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 August 18, 2025.

This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/172:54 pmONT - BHM
1 stop6h 39mAmerican Airlines
Sat 9/204:52 pmBHM - ONT
1 stop7h 41mAmerican Airlines
Deal found 8/16$282
This Delta deal was found by Cheapflights users on 8/16. 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.
Fri 9/1210:00 pmONT - BHM
1 stop8h 28mDelta
Tue 9/164:18 pmBHM - ONT
1 stop8h 05mDelta
Deal found 8/16$287
This Delta deal was found by Cheapflights users on 8/16. 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.
Wed 12/2411:56 amONT - BHM
1 stop8h 54mDelta
Mon 12/295:15 pmBHM - ONT
1 stop7h 41mDelta
Deal found 8/16$347
This Delta deal was found by Cheapflights users on 8/15. 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.
Fri 10/310:00 pmONT - BHM
1 stop8h 28mDelta
Mon 10/65:57 pmBHM - ONT
1 stop6h 25mDelta
Deal found 8/15$357
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Tue 9/96:04 amONT - BHM
1 stop8h 15mUnited Airlines
Thu 9/114:55 pmBHM - ONT
1 stop6h 30mUnited Airlines
Deal found 8/17$377
This Delta deal was found by Cheapflights users on 8/16. 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 12/2310:29 pmONT - BHM
1 stop8h 23mDelta
Mon 12/295:15 pmBHM - ONT
1 stop7h 41mDelta
Deal found 8/16$387
This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:53 amONT - BHM
2 stops9h 54mAmerican Airlines
Tue 9/1610:20 amBHM - ONT
2 stops9h 56mAmerican Airlines
Deal found 8/16$399
This Southwest deal was found by Cheapflights users on 8/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:15 pmONT - BHM
1 stop7h 25mSouthwest
Mon 10/61:25 pmBHM - ONT
1 stop11h 25mSouthwest
Deal found 8/15$402
This United Airlines deal was found by Cheapflights users on 8/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/157:00 amONT - BHM
1 stop9h 49mUnited Airlines
Wed 9/173:35 pmBHM - ONT
1 stop7h 08mUnited Airlines
Deal found 8/15$408
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Mon 9/227:00 amONT - BHM
1 stop9h 49mUnited Airlines
Sat 9/278:50 amBHM - ONT
2 stops13h 34mUnited Airlines
Deal found 8/17$413

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 August 18, 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

Wed 9/17

2:54 pm-11:33 pm

1 stop6h 39m

Birmingham

Sat 9/20

4:52 pm-10:33 pm

1 stop7h 41m

$282

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/8

10:00 pm-7:59 am

1 stop7h 59m

Birmingham

Mon 10/13

5:57 pm-10:22 pm

1 stop6h 25m

$287

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Fri 9/12

10:00 pm-8:28 am

1 stop8h 28m

Birmingham

Tue 9/16

4:18 pm-10:23 pm

1 stop8h 05m

$287

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Fri 10/3

10:00 pm-8:28 am

1 stop8h 28m

Birmingham

Mon 10/6

5:57 pm-10:22 pm

1 stop6h 25m

$357

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 9/9

6:04 am-2:22 pm

1 stop6h 18m

Birmingham

Thu 9/11

3:00 pm-9:25 pm

1 stop8h 25m

$377

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Thu 9/25

11:55 am-8:21 pm

1 stop6h 26m

$149

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 10/21

7:02 am-4:34 pm

1 stop7h 32m

$184

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 10/28

7:00 am-6:38 pm

1 stop9h 38m

$184

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 9/10

6:04 am-2:22 pm

1 stop6h 18m

$184

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 9/16

6:04 am-4:19 pm

1 stop8h 15m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

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, October is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $376). 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 August 18, 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 August 18, 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
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

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 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 American Airlines and Delta fly from Ontario to Birmingham, Alabama in about 6h 39m. The time it takes to get you to your destination can typically vary by up to 1h 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 $341. 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, October is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $376). 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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Alternative routes for Ontario to Birmingham

See prices for flight routes from nearby airports that may be better suited for you.
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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$276Average$416FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$339Average$415FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$341Average$444FlexibilityNo cancel feeOn-time63%

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