HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Birmingham

$144+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BHM
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Birmingham with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$297
(Delta)

One-way from

$144
(Delta)

Popular in

July

Cheapest in

March

Average price

$511
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. 3% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals

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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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 7/310:05 pmONT - BHM
1 stop8h 19mDelta
Tue 7/85:16 amBHM - ONT
1 stop7h 14mDelta
Deal found 4/29$297
This United Airlines deal was found by Cheapflights users on 4/30. 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 7/156:00 amONT - BHM
1 stop8h 22mUnited Airlines
Wed 7/235:05 pmBHM - ONT
1 stop6h 32mUnited Airlines
Deal found 4/30$377
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 6/2612:59 amONT - BHM
1 stop6h 05mAmerican Airlines
Fri 7/45:30 amBHM - ONT
2 stops10h 20mAmerican Airlines
Deal found 4/30$387
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/287:22 pmONT - BHM
2 stops12h 52mAlaska Airlines
Sun 8/319:30 amBHM - ONT
2 stops16h 29mAlaska Airlines
Deal found 4/30$642
This Southwest deal was found by Cheapflights users on 4/29. 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 4/307:00 amONT - BHM
1 stop6h 50mSouthwest
Thu 5/11:45 pmBHM - ONT
1 stop5h 50mSouthwest
Deal found 4/29$895

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 May 1, 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 7/3

10:05 pm-8:24 am

1 stop8h 19m

Birmingham

Tue 7/8

5:16 am-10:30 am

1 stop7h 14m

$297

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Tue 7/15

6:00 am-4:22 pm

1 stop8h 22m

Birmingham

Wed 7/23

5:05 pm-9:37 pm

1 stop6h 32m

$377

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Thu 6/26

12:59 am-9:04 am

1 stop6h 05m

Birmingham

Fri 7/4

5:30 am-1:50 pm

2 stops10h 20m

$387

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Thu 8/28

7:22 pm-10:14 am

2 stops12h 52m

Birmingham

Sun 8/31

9:30 am-11:59 pm

2 stops16h 29m

$642

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 5/21

12:18 pm-8:46 pm

1 stop6h 28m

$144

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Wed 5/28

5:30 am-3:50 pm

2 stops8h 20m

$159

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Sat 7/26

5:05 am-2:13 pm

1 stop7h 08m

$171

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Thu 6/26

12:59 am-9:04 am

1 stop6h 05m

$239

OntarioBirmingham

ONT - BHM

ONTBHM

Ontario

Fri 6/6

7:20 pm-10:24 am

2 stops13h 04m

$384

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 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 eDreams the most. eDreams 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, 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 May 1, 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.

Rainfall in Birmingham by month

Plan your trip to Birmingham by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Birmingham, Alabama ranges from 3.4 - 5.2 inches per month. March is typically the wettest month, when rainfall can reach 5.2 in. October is typically the driest time to visit Birmingham, Alabama when rainfall is around 3.4 in.

Temperature in Birmingham by month

Plan your trip to Birmingham by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Birmingham, Alabama, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 44.6 F).

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 May 1, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Ontario to Birmingham have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $297. Other airlines that can offer you cheap pricing are United Airlines, from $377, and American Airlines, from $387. These flights start at 38% lower than the current average price 3 months from now.

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

    $144 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $159 and $171, respectively.

  • 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 Ontario?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Birmingham

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Atlanta flights
San Francisco to Atlanta flights
Ontario to Atlanta flights
Santa Ana to Atlanta flights
Burbank to Atlanta flights
San Diego to Atlanta flights
Oakland to Atlanta flights
San Jose to Atlanta flights
Sacramento to Atlanta flights
Las Vegas to Atlanta flights
Los Angeles to Pensacola flights
Fresno to Atlanta flights
San Diego to Pensacola flights
Reno to Atlanta flights
Ontario to Pensacola flights
Los Angeles to Birmingham flights
Ontario to Chattanooga flights
San Francisco to Pensacola flights
Los Angeles to Chattanooga flights
Santa Ana to Pensacola flights
San Francisco to Birmingham flights
Burbank to Pensacola flights
Long Beach to Atlanta flights
San Diego to Birmingham flights
Los Angeles to Valparaiso flights
Las Vegas to Pensacola flights
Las Vegas to Birmingham flights
Los Angeles to Huntsville flights
San Francisco to Chattanooga flights
San Diego to Valparaiso flights
Palm Springs to Atlanta flights
Burbank to Chattanooga flights
Ontario to Huntsville flights
Santa Ana to Valparaiso flights
Santa Ana to Chattanooga flights
San Jose to Birmingham flights
Ontario to Mobile flights
San Francisco to Huntsville flights
Ontario to Montgomery flights
Sacramento to Pensacola flights
Ontario to Valparaiso flights
Santa Barbara to Atlanta flights
San Jose to Pensacola flights
Los Angeles to Mobile flights
San Diego to Huntsville flights
Burbank to Birmingham flights
Santa Ana to Birmingham flights
San Francisco to Valparaiso flights
San Diego to Montgomery flights

Top 4 airlines flying from Ontario to Birmingham

Discover the top 4 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$336Average$445FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$341Average$444FlexibilityNo cancel feeOn-time63%
DeltaCheapest$346Average$542FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$346Average$469FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.