HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$129+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
BHM — ONT
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
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 March 23, 2026.

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.
Wed 4/152:45 pm
BHM
-
ONT
1 stop9h 05m
United Airlines
Sat 4/185:10 am
ONT
-
BHM
1 stop7h 46m
United Airlines
Deal found 3/22$347
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/159:15 am
BHM
-
ONT
1 stop7h 55m
Southwest
Sat 4/185:40 am
ONT
-
BHM
2 stops8h 55m
Southwest
Deal found 3/22$352
This American Airlines deal was found by Cheapflights users on 3/23. 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 4/155:54 pm
BHM
-
ONT
1 stop7h 52m
American Airlines
Sat 4/186:15 am
ONT
-
BHM
2 stops10h 22m
American Airlines
Deal found 3/23$386
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:25 am
BHM
-
ONT
1 stop6h 10m
Southwest
Tue 6/301:30 pm
ONT
-
BHM
2 stops8h 05m
Southwest
Deal found 3/22$402
This Southwest deal was found by Cheapflights users on 3/23. 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 5/282:55 pm
BHM
-
ONT
1 stop7h 45m
Southwest
Sun 5/313:00 pm
ONT
-
BHM
1 stop6h 25m
Southwest
Deal found 3/23$406
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:20 pm
BHM
-
ONT
1 stop8h 15m
Southwest
Fri 4/1712:40 pm
ONT
-
BHM
1 stop5h 45m
Southwest
Deal found 3/22$432
This Southwest deal was found by Cheapflights users on 3/18. 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 6/206:50 pm
BHM
-
ONT
1 stop5h 40m
Southwest
Wed 6/2410:10 am
ONT
-
BHM
2 stops11h 25m
Southwest
Deal found 3/18$438

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 March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$347
(United Airlines)

One-way from

$129
(Southwest)

Popular in

August

Cheapest in

October

Average price

$457
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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 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 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 March 23, 2026.
Use the filters below to find and compare flights from Birmingham to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 4/15

5:00 am-10:09 am

1 stop7h 09m

Ontario

Sat 4/18

10:26 pm-8:18 am

1 stop7h 52m

$347
Quickest round-trip

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 4/21

5:30 pm-9:50 pm

1 stop6h 20m

Ontario

Tue 4/28

1:55 pm-9:55 pm

1 stop6h 00m

$347

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 4/15

9:15 am-3:10 pm

1 stop7h 55m

Ontario

Sat 4/18

5:40 am-4:35 pm

2 stops8h 55m

$352

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 4/14

3:40 pm-10:10 pm

2 stops8h 30m

Ontario

Fri 4/17

12:40 pm-10:30 pm

2 stops7h 50m

$442

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Sat 6/20

3:20 pm-10:50 pm

2 stops9h 30m

Ontario

Wed 6/24

10:10 am-11:35 pm

2 stops11h 25m

$443

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Tue 5/12

4:55 pm-9:58 pm

1 stop7h 03m

Ontario

Wed 5/13

5:00 am-2:56 pm

1 stop7h 56m

$447

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Wed 5/27

3:40 pm-8:42 pm

1 stop7h 02m

Ontario

Sun 5/31

5:45 am-4:20 pm

1 stop8h 35m

$492

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 4/16

11:00 am-4:25 pm

1 stop7h 25m

Ontario

Sun 4/19

11:55 pm-2:15 pm

1 stop12h 20m

$492

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Mon 4/13

5:15 am-9:55 am

1 stop6h 40m

Ontario

Fri 4/17

12:40 pm-8:25 pm

1 stop5h 45m

$517

BirminghamOntario

BHM - ONT

BHMONT

Birmingham

Thu 4/9

5:15 am-9:55 am

1 stop6h 40m

Ontario

Sun 4/12

3:50 pm-9:20 am

2 stops15h 30m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 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 Birmingham, Alabama-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Birmingham, Alabama-Ontario flight deals on Cheapflights vs. FlightHub >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 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 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, February is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $140). Flying from Birmingham, Alabama to Ontario in November is currently the most expensive (average of $303). 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 March 23, 2026.
Peruse reviews from past customers who have flown with Southwest 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
4,324 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,488 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 American Airlines and Southwest fly from Birmingham, Alabama to Ontario in about 6h 20m. The time it takes to get you to your destination can typically vary by up to 49m. 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 $333. Another airline that can offer you cheap pricing is American Airlines. Users have found that Southwest is 25% 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, February is the cheapest month in which you can book a flight from Birmingham, Alabama to Ontario (average of $140). Flying from Birmingham, Alabama to Ontario in November is currently the most expensive (average of $303). 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 Ontario flights
Atlanta to Santa Ana flights
Pensacola to Las Vegas flights
Atlanta to Burbank flights
Chattanooga to Las Vegas flights
Atlanta to San Jose flights
Birmingham to Las Vegas flights
Atlanta to Sacramento flights
Atlanta to Reno flights
Atlanta to Fresno flights
Atlanta to Palm Springs flights
Birmingham to Los Angeles flights
Mobile to Las Vegas flights
Pensacola to Los Angeles flights
Montgomery to Las Vegas flights
Chattanooga to Los Angeles flights
Atlanta to Oakland flights
Huntsville to Las Vegas flights
Atlanta to Long Beach flights
Pensacola to San Diego flights
Chattanooga to San Diego flights
Valparaiso to Las Vegas flights
Huntsville to San Francisco flights
Huntsville to San Diego flights
Chattanooga to Ontario flights
Chattanooga to Santa Ana flights
Pensacola to San Francisco flights
Birmingham to San Diego flights
Birmingham to San Francisco flights
Huntsville to Los Angeles flights
Pensacola to Ontario flights
Pensacola to San Jose flights
Chattanooga to San Francisco flights
Chattanooga to Sacramento flights
Pensacola to Fresno flights
Birmingham to Sacramento flights
Huntsville to Sacramento flights
Montgomery to Los Angeles flights
Valparaiso to Reno flights
Montgomery to San Diego flights
Mobile to Los Angeles flights
Atlanta to Monterey flights
Chattanooga to Fresno flights

Top 2 airlines flying from Birmingham to Ontario

Discover the top 2 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$333Average$468FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$346Average$423FlexibilityNo 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.