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$185+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHM
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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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 October 16, 2025.

This Delta deal was found by Cheapflights users on 10/15. 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.
Wed 11/510:00 pmONT - BHM
1 stop7h 59mDelta
Wed 11/126:07 pmBHM - ONT
1 stop6h 57mDelta
Deal found 10/15$307
This American Airlines deal was found by Cheapflights users on 10/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:59 amONT - BHM
2 stops10h 58mAmerican Airlines
Wed 11/125:03 amBHM - ONT
2 stops9h 00mAmerican Airlines
Deal found 10/15$317
This Delta deal was found by Cheapflights users on 10/16. 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.
Thu 12/1110:25 pmONT - BHM
1 stop7h 36mDelta
Mon 12/156:07 pmBHM - ONT
1 stop6h 57mDelta
Deal found 10/16$351
This Delta deal was found by Cheapflights users on 10/15. 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.
Tue 12/1610:25 pmONT - BHM
1 stop7h 36mDelta
Thu 1/15:20 amBHM - ONT
1 stop6h 45mDelta
Deal found 10/15$353
This American Airlines deal was found by Cheapflights users on 10/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:49 pmONT - BHM
1 stop8h 19mAmerican Airlines
Mon 11/245:03 amBHM - ONT
1 stop6h 54mAmerican Airlines
Deal found 10/15$358
This Delta deal was found by Cheapflights users on 10/15. 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.
Mon 12/1512:12 pmONT - BHM
1 stop8h 37mDelta
Thu 1/15:20 amBHM - ONT
1 stop6h 45mDelta
Deal found 10/15$375
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Tue 12/165:05 amONT - BHM
1 stop6h 42mUnited Airlines
Wed 12/315:00 pmBHM - ONT
1 stop6h 52mUnited Airlines
Deal found 10/15$413
This Delta deal was found by Cheapflights users on 10/15. 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.
Wed 10/2911:36 amONT - BHM
1 stop8h 58mDelta
Wed 11/196:07 pmBHM - ONT
1 stop6h 57mDelta
Deal found 10/15$422
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Wed 11/125:05 amONT - BHM
2 stops9h 08mUnited Airlines
Thu 11/131:42 pmBHM - ONT
1 stop10h 49mUnited Airlines
Deal found 10/15$424

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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$307
(Delta)

One-way from

$185
(United Airlines)

Popular in

November

Cheapest in

August

Average price

$587
Provider with most accurate pricing for Ontario-Birmingham flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Birmingham flights.
Search Deals
From Ontario to Birmingham
Search Deals
One-way flight from Ontario to Birmingham
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($142 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 16, 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

Thu 12/11

10:25 pm-8:01 am

1 stop7h 36m

Birmingham

Mon 12/15

6:07 pm-11:04 pm

1 stop6h 57m

$351

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 12/16

10:25 pm-8:01 am

1 stop7h 36m

Birmingham

Thu 1/1

5:20 am-10:05 am

1 stop6h 45m

$353

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Fri 11/21

12:49 pm-11:08 pm

1 stop8h 19m

Birmingham

Mon 11/24

5:03 am-9:57 am

1 stop6h 54m

$358

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Mon 12/15

12:12 pm-10:49 pm

1 stop8h 37m

Birmingham

Thu 1/1

5:20 am-10:05 am

1 stop6h 45m

$375

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 12/16

5:05 am-1:47 pm

1 stop6h 42m

Birmingham

Wed 12/31

5:00 pm-9:52 pm

1 stop6h 52m

$413

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 12/17

6:00 am-2:01 pm

1 stop6h 01m

Birmingham

Wed 12/31

5:00 pm-9:52 pm

1 stop6h 52m

$413

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 10/29

11:36 am-10:34 pm

1 stop8h 58m

Birmingham

Wed 11/19

6:07 pm-11:04 pm

1 stop6h 57m

$422

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 11/12

5:05 am-4:13 pm

2 stops9h 08m

Birmingham

Thu 11/13

8:00 am-5:34 pm

2 stops11h 34m

$429

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 12/17

6:00 am-4:19 pm

1 stop8h 19m

$199

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 12/3

6:00 am-2:01 pm

1 stop6h 01m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 18 results
1
2

Compare providers for flights from Ontario to Birmingham

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 Ontario to Birmingham in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*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 Ontario-Birmingham, Alabama flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Birmingham, Alabama flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Birmingham, Alabama flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Birmingham, Alabama 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 Ontario-Birmingham, Alabama 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 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, July is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $128). Flying from Ontario to Birmingham, Alabama in January is currently the most expensive (average of $288). 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 October 16, 2025.

It’s typically best to fly out from Ontario to Birmingham, Alabama at noon. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, 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 October 16, 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
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

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
8.0
Very good
7,984 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

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
11,043 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Overall

8.0

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 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, American Airlines, and United Airlines fly from Ontario to Birmingham, Alabama in about 6h 42m. The time it takes to get you to your destination can typically vary by up to 1h 37m. 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 $351. These flights start at 40% 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, July is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $128). Flying from Ontario to Birmingham, Alabama in January is currently the most expensive (average of $288). 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
Fultondale
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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$276Average$402FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$339Average$406FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$351Average$470FlexibilityNo cancel feeOn-time63%

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