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$174+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHM
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
1 adult, Economy
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Cheap 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 March 24, 2026.

This Delta deal was found by Cheapflights users on 3/21. 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.
Mon 4/2010:15 pm
ONT
-
BHM
1 stop8h 07m
Delta
Sat 4/2512:36 pm
BHM
-
ONT
1 stop7h 57m
Delta
Deal found 3/21$402
This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1911:55 pm
ONT
-
BHM
1 stop12h 20m
Southwest
Thu 4/232:40 pm
BHM
-
ONT
1 stop8h 05m
Southwest
Deal found 3/19$422
This Southwest deal was found by Cheapflights users on 3/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1612:40 pm
ONT
-
BHM
1 stop5h 45m
Southwest
Tue 4/215:30 pm
BHM
-
ONT
1 stop6h 20m
Southwest
Deal found 3/21$432
This American Airlines deal was found by Cheapflights users on 3/19. 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.
Mon 4/1311:29 pm
ONT
-
BHM
1 stop7h 30m
American Airlines
Fri 4/175:54 pm
BHM
-
ONT
1 stop7h 52m
American Airlines
Deal found 3/19$447
This United Airlines deal was found by Cheapflights users on 3/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/125:00 am
ONT
-
BHM
2 stops13h 44m
United Airlines
Wed 5/133:05 pm
BHM
-
ONT
1 stop8h 53m
United Airlines
Deal found 3/22$452
This Southwest deal was found by Cheapflights users on 3/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:40 am
ONT
-
BHM
2 stops8h 55m
Southwest
Sun 5/171:10 pm
BHM
-
ONT
2 stops9h 25m
Southwest
Deal found 3/20$453
This Delta deal was found by Cheapflights users on 3/21. 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.
Mon 4/2010:15 pm
ONT
-
BHM
1 stop8h 07m
Delta
Fri 4/244:19 pm
BHM
-
ONT
1 stop6h 41m
Delta
Deal found 3/21$457
This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:55 pm
ONT
-
BHM
1 stop12h 35m
Southwest
Fri 4/172:40 pm
BHM
-
ONT
2 stops10h 00m
Southwest
Deal found 3/19$458
This United Airlines deal was found by Cheapflights users on 3/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/71:34 pm
ONT
-
BHM
1 stop6h 10m
United Airlines
Tue 4/144:55 pm
BHM
-
ONT
1 stop6h 55m
United Airlines
Deal found 3/22$462
This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1612:40 pm
ONT
-
BHM
2 stops7h 50m
Southwest
Sun 4/195:00 am
BHM
-
ONT
1 stop6h 50m
Southwest
Deal found 3/19$463

Find 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 March 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$402
(Delta)

One-way from

$174
(Delta)

Popular in

November

Cheapest in

February

Average price

$495
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 ($139 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 24, 2026.
Use the filters below to find and compare flights from Ontario to Birmingham that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 5/12

6:00 am-4:10 pm

1 stop8h 10m

Birmingham

Wed 5/13

3:05 pm-9:58 pm

1 stop8h 53m

$402

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Mon 4/13

9:55 pm-12:30 pm

1 stop12h 35m

Birmingham

Fri 4/17

2:40 pm-10:40 pm

2 stops10h 00m

$458

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 4/7

6:15 am-3:35 pm

2 stops7h 20m

Birmingham

Tue 4/14

3:40 pm-9:30 pm

2 stops7h 50m

$472

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 7/29

5:45 am-2:09 pm

1 stop6h 24m

Birmingham

Wed 8/5

5:08 pm-9:55 pm

1 stop6h 47m

$497

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 5/5

5:00 am-8:44 pm

2 stops13h 44m

Birmingham

Fri 5/8

3:52 pm-8:36 pm

1 stop6h 44m

$507

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Fri 5/8

10:00 pm-8:13 am

1 stop8h 13m

Birmingham

Sun 5/10

5:20 pm-9:48 pm

1 stop6h 28m

$520
Quickest round-trip

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Thu 4/16

3:00 pm-10:30 pm

1 stop5h 30m

Birmingham

Sun 4/19

5:00 am-9:50 am

1 stop6h 50m

$528

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 4/21

6:00 am-9:44 pm

2 stops13h 44m

Birmingham

Tue 4/28

11:00 am-8:36 pm

2 stops11h 36m

$543

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Sun 4/5

6:25 am-2:25 pm

1 stop6h 00m

Birmingham

Thu 4/9

5:15 am-9:55 am

1 stop6h 40m

$577

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Mon 4/6

5:40 am-3:00 pm

1 stop7h 20m

Birmingham

Fri 4/10

11:00 am-4:25 pm

1 stop7h 25m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 20 resultsSorted by cheapest first
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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 $129). Flying from Ontario to Birmingham, Alabama in March is currently the most expensive (average of $292). 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.

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 March 24, 2026.
Read through reviews of airlines operating flights from Ontario to Birmingham, such as Southwest,Delta, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,330 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,330 reviews
Southwest
8.0
Very good
4,330 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,320 reviews
Southwest
8.0
Very good
4,330 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.1
Good
11,492 reviews
Southwest
8.0
Very good
4,330 reviews

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 United Airlines and Southwest fly from Ontario to Birmingham, Alabama in about 8h 10m. The time it takes to get you to your destination can typically vary by up to 4h 25m. 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 $286, and Southwest, from $333. 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, July is the cheapest month in which you can book a flight from Ontario to Birmingham, Alabama (average of $129). Flying from Ontario to Birmingham, Alabama in March is currently the most expensive (average of $292). 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
Bessemer
Hoover
Homewood

Browse thousands of different options on Cheapflights for your next trip

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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 March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$276Average$402FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$286Average$437FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$333Average$483FlexibilityNo cancel feeOn-time63%

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