HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$131+ Cheap flights from Birmingham, AL to Ontario (BHM - ONT)

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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
BHM — ONT
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Birmingham to Ontario 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 Birmingham to Ontario

Cheapest flights from Birmingham to Ontario
Explore the most affordable flight options available from Birmingham to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 30, 2025.

This United Airlines deal was found by Cheapflights users on 12/28. 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 12/295:00 pmBHM - ONT
1 stop6h 52mUnited Airlines
Sun 1/46:10 amONT - BHM
1 stop8h 03mUnited Airlines
Deal found 12/28$977
This Southwest deal was found by Cheapflights users on 12/28. 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 12/305:00 amBHM - ONT
1 stop7h 40mSouthwest
Sun 1/45:55 amONT - BHM
2 stops8h 30mSouthwest
Deal found 12/28$982
This Delta deal was found by Cheapflights users on 12/28. 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 12/311:18 pmBHM - ONT
1 stop8h 32mDelta
Sun 1/410:29 pmONT - BHM
1 stop7h 39mDelta
Deal found 12/28$995
This Delta deal was found by Cheapflights users on 12/29. 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.
Wed 12/3110:40 amBHM - ONT
2 stops13h 53mDelta
Mon 1/510:30 pmONT - BHM
1 stop7h 38mDelta
Deal found 12/29$1,000
This Delta deal was found by Cheapflights users on 12/28. 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 12/295:20 amBHM - ONT
1 stop6h 40mDelta
Mon 1/510:30 pmONT - BHM
1 stop7h 38mDelta
Deal found 12/28$1,016
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/305:00 pmBHM - ONT
1 stop6h 52mUnited Airlines
Tue 1/68:00 amONT - BHM
1 stop6h 12mUnited Airlines
Deal found 12/28$1,028
This United Airlines deal was found by Cheapflights users on 12/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:30 pmBHM - ONT
1 stop7h 37mUnited Airlines
Sun 1/46:10 amONT - BHM
1 stop5h 55mUnited Airlines
Deal found 12/29$1,057
This Southwest deal was found by Cheapflights users on 12/28. 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 12/3111:20 amBHM - ONT
1 stop6h 00mSouthwest
Fri 1/25:55 amONT - BHM
2 stops7h 40mSouthwest
Deal found 12/28$1,062
This Southwest deal was found by Cheapflights users on 12/29. 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.
Tue 12/303:00 pmBHM - ONT
2 stops10h 10mSouthwest
Thu 1/18:40 amONT - BHM
2 stops9h 50mSouthwest
Deal found 12/29$1,067
This Delta deal was found by Cheapflights users on 12/28. 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 12/295:20 amBHM - ONT
1 stop6h 40mDelta
Fri 1/210:29 pmONT - BHM
1 stop7h 58mDelta
Deal found 12/28$1,075

Find flight deals from Birmingham to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Birmingham (BHM) to Ontario (ONT). 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 December 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$325
(Delta)

One-way from

$131
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$558
Provider with most accurate pricing for Birmingham-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Birmingham-Ontario flights.
Search Deals
From Birmingham to Ontario
Search Deals
One-way flight from Birmingham to Ontario
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Birmingham to Ontario 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 December 30, 2025.
Use the filters below to find and compare flights from Birmingham to Ontario that are best for you.

Fly from

Birmingham

Fly to

Ontario

Route

Depart

Return

Price

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 2/24

5:20 am-12:02 pm

1 stop8h 42m

Ontario

Tue 3/3

10:20 pm-8:01 am

1 stop7h 41m

$325

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 2/26

4:56 pm-9:59 pm

1 stop7h 03m

Ontario

Tue 3/3

5:00 am-2:01 pm

1 stop7h 01m

$346

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 1/17

3:00 pm-9:58 pm

1 stop8h 58m

Ontario

Sun 1/18

6:00 am-2:17 pm

1 stop6h 17m

$351

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 2/26

5:00 am-12:00 pm

2 stops9h 00m

Ontario

Tue 3/3

10:40 am-9:20 pm

2 stops8h 40m

$356

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 1/29

3:52 pm-9:05 pm

1 stop7h 13m

Ontario

Mon 2/2

10:30 pm-8:08 am

1 stop7h 38m

$385

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 2/26

3:57 pm-9:05 pm

1 stop7h 08m

Ontario

Mon 3/2

10:20 pm-8:01 am

1 stop7h 41m

$385

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 1/28

3:18 pm-8:58 pm

1 stop7h 40m

Ontario

Wed 2/4

1:24 pm-9:31 pm

1 stop6h 07m

$397

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 2/24

7:57 am-5:41 pm

2 stops11h 44m

Ontario

Wed 2/25

5:00 am-2:01 pm

1 stop7h 01m

$402

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 1/27

11:14 am-8:58 pm

2 stops11h 44m

Ontario

Tue 2/3

5:05 am-4:12 pm

2 stops9h 07m

$407

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sun 1/18

3:00 pm-9:58 pm

1 stop8h 58m

$131

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 20 results
1
2

Compare providers for flights from Birmingham to Ontario

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 Birmingham to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 Birmingham, Alabama-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Birmingham, Alabama-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Birmingham, Alabama-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Birmingham, Alabama-Ontario 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 Birmingham, Alabama-Ontario 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 Birmingham to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $134). Flying from Birmingham, Alabama to Ontario in January is currently the most expensive (average of $299). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and American Airlines from Birmingham to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

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
4,251 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

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
7.9
Good
8,014 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

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
11,074 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

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 Birmingham to Ontario. 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 Birmingham, Alabama to Ontario?

    Airlines like Delta and United Airlines fly from Birmingham, Alabama to Ontario in about 7h 03m. The time it takes to get you to your destination can typically vary by up to 1h 39m. The distance between Birmingham, Alabama and Ontario is about 1763 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Birmingham, Alabama to Ontario round-trip from $286. Other airlines that can offer you cheap pricing are American Airlines, from $361, and Southwest, from $366. Users have found that Delta is 34% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $134). Flying from Birmingham, Alabama to Ontario in January is currently the most expensive (average of $299). 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

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 Birmingham to Ontario

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

Top 3 airlines flying from Birmingham to Ontario

Discover the top 3 airlines that operate flights from Birmingham to Ontario. 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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$286Average$402FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$361Average$411FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$366Average$468FlexibilityNo cancel feeOn-time63%

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.