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$289+ Cheap flights from Allentown to Ontario (ABE - 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — ONT
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
1 adult, Economy
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Cheap flight deals from Allentown to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) 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 August 7, 2025.

Round-trip from

$309
(Delta)

One-way from

$289
(Delta)

Popular in

June

Cheapest in

January

Average price

$413
From Allentown-Bethlehem to Ontario
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One-way flight from Allentown-Bethlehem to Ontario
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Highest demand for flights based on searches. 31% potential increase in price ($287 potential increase over avg. RT price).
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Cheapest flight prices on average. 11% potential price decrease ($66 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Allentown to Ontario

Cheapest flights from Allentown to Ontario
Explore the most affordable flight options available from Allentown to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

This Delta deal was found by Cheapflights users on 8/6. 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.
Sat 11/151:00 pmABE - ONT
1 stop9h 42mDelta
Tue 11/1810:59 pmONT - ABE
1 stop10h 09mDelta
Deal found 8/6$309
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 9/135:28 pmABE - ONT
1 stop8h 02mUnited Airlines
Mon 9/156:50 pmONT - ABE
2 stops14h 08mUnited Airlines
Deal found 8/6$444
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Sat 9/205:28 pmABE - ONT
1 stop8h 02mUnited Airlines
Sat 9/277:02 amONT - ABE
1 stop6h 51mUnited Airlines
Deal found 8/6$469
This Delta deal was found by Cheapflights users on 8/7. 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 8/286:00 amABE - ONT
1 stop7h 35mDelta
Mon 9/111:45 amONT - ABE
1 stop7h 54mDelta
Deal found 8/7$499
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/195:28 pmABE - ONT
1 stop8h 02mUnited Airlines
Tue 8/267:00 amONT - ABE
1 stop6h 53mUnited Airlines
Deal found 8/6$514
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Fri 8/225:28 pmABE - ONT
1 stop8h 02mUnited Airlines
Mon 8/257:00 amONT - ABE
1 stop25h 58mUnited Airlines
Deal found 8/5$517

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown 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 August 7, 2025.
Use the filters below to find and compare flights from Allentown to Ontario that are best for you.

Fly from

Allentown

Fly to

Ontario

Route

Depart

Return

Price

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 11/15

1:00 pm-7:42 pm

1 stop9h 42m

Ontario

Tue 11/18

10:59 pm-12:08 pm

1 stop10h 09m

$309

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 9/13

5:28 pm-10:30 pm

1 stop8h 02m

Ontario

Mon 9/15

6:50 pm-11:58 am

2 stops14h 08m

$444

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 9/20

5:28 pm-10:30 pm

1 stop8h 02m

Ontario

Sat 9/27

7:02 am-4:53 pm

1 stop6h 51m

$469

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Thu 8/28

6:00 am-10:35 am

1 stop7h 35m

Ontario

Mon 9/1

11:45 am-10:39 pm

1 stop7h 54m

$499

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Tue 8/19

5:28 pm-10:30 pm

1 stop8h 02m

Ontario

Tue 8/26

7:00 am-4:53 pm

1 stop6h 53m

$514

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Fri 8/22

5:28 pm-10:30 pm

1 stop8h 02m

Ontario

Mon 8/25

7:00 am-11:58 am

1 stop25h 58m

$517

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 9/6

6:00 am-10:35 am

1 stop7h 35m

$289

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 8/30

6:00 am-10:20 am

1 stop7h 20m

$334

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Wed 8/20

6:00 am-10:35 am

1 stop7h 35m

$339

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Wed 8/13

6:00 am-10:35 am

1 stop7h 35m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Showing 1-10 of 18 results
1
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Best time to book a flight from Allentown to Ontario

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

What is the cheapest month to book a flight from Allentown to Ontario?

Currently, August is the cheapest month in which you can book a flight from Allentown to Ontario (average of $246). Flying from Allentown to Ontario in March is currently the most expensive (average of $328). 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 August 7, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Allentown to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,987 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Allentown to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Allentown to Ontario round-trip?

    Cheapflights users have booked flights from Allentown to Ontario round-trip from $309. Delta is 50% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Allentown 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 Allentown to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Allentown to Ontario (average of $246). Flying from Allentown to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Allentown to Ontario

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Top airline flying from Allentown to Ontario

Discover the top airline that operate flights from Allentown 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 August 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$318Average$598FlexibilityNo cancel feeOn-timeN/A

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