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$74+ Cheap flights from Dallas to Ontario (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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
DFW — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Dallas to Ontario are usually found in September or February, booked 71 days in advance, depart on a Thursday or Wednesday and return on a Saturday

Cheap flight deals from Dallas to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Dallas (A78) 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 June 12, 2025.

Round-trip from

$145
(CheapOair)

One-way from

$74
(Priceline)

Popular in

January

Cheapest in

September

Average price

$228
From Dallas to Ontario
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One-way flight from Dallas to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Dallas to Ontario

Cheapest flights from Dallas to Ontario
Explore the most affordable flight options available from Dallas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/410:34 pmDFW - ONT
1 stop15h 13mFrontier
Fri 10/1012:59 amONT - DFW
1 stop10h 13mFrontier
Deal found 6/10$145
This Southwest deal was found by Cheapflights users on 6/10. 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 9/62:35 pmDAL - ONT
Nonstop3h 05mSouthwest
Sat 9/206:45 amONT - DAL
Nonstop3h 00mSouthwest
Deal found 6/10$179
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 11/48:40 pmDFW - ONT
Nonstop3h 20mAmerican Airlines
Tue 11/1111:59 pmONT - DFW
Nonstop3h 01mAmerican Airlines
Deal found 6/11$209
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/64:46 pmDFW - ONT
1 stop9h 13mHawaiian Airlines
Sun 8/107:30 amONT - DFW
1 stop7h 46mHawaiian Airlines
Deal found 6/11$232
This Delta deal was found by Cheapflights users on 6/10. 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.
Tue 7/224:25 pmDFW - ONT
1 stop8h 02mDelta
Sat 8/27:05 amONT - DFW
1 stop7h 35mDelta
Deal found 6/10$237
This Delta deal was found by Cheapflights users on 6/11. 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 8/133:52 pmDAL - ONT
1 stop8h 28mDelta
Tue 8/1911:45 amONT - DAL
1 stop7h 23mDelta
Deal found 6/11$237
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
Sat 8/96:00 amDFW - ONT
1 stop9h 26mAlaska Airlines
Sun 8/107:30 amONT - DFW
1 stop7h 46mAlaska Airlines
Deal found 6/11$262

Cheapflights Fare Finder

Customize your flight search to find flights from Dallas 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 June 12, 2025.
Use the filters below to find and compare flights from Dallas to Ontario that are best for you.

Fly from

Dallas

Fly to

Ontario

Route

Depart

Return

Price

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Sat 10/4

10:34 pm-11:47 am

1 stop15h 13m

Ontario

Fri 10/10

12:59 am-1:12 pm

1 stop10h 13m

$145

DallasOntario

DAL - ONT

DALONT

Dallas Love Field

Sat 9/6

2:35 pm-3:40 pm

Nonstop3h 05m

Ontario

Sat 9/20

6:45 am-11:45 am

Nonstop3h 00m

$179

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Tue 11/4

8:40 pm-10:00 pm

Nonstop3h 20m

Ontario

Tue 11/11

11:59 pm-5:00 am

Nonstop3h 01m

$209

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Wed 8/6

4:46 pm-11:59 pm

1 stop9h 13m

Ontario

Sun 8/10

7:30 am-5:16 pm

1 stop7h 46m

$232

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Tue 7/22

6:15 pm-11:42 pm

1 stop7h 27m

Ontario

Tue 8/5

2:14 pm-11:51 pm

1 stop7h 37m

$237

DallasOntario

DAL - ONT

DALONT

Dallas Love Field

Wed 8/13

3:52 pm-10:20 pm

1 stop8h 28m

Ontario

Wed 8/20

7:05 am-5:43 pm

1 stop8h 38m

$237

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Sat 8/9

6:16 pm-12:13 am

1 stop7h 57m

Ontario

Thu 8/14

6:00 am-3:46 pm

1 stop7h 46m

$262

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Tue 8/5

8:00 am-9:09 am

Nonstop3h 09m

$74

DallasOntario

DAL - ONT

DALONT

Dallas Love Field

Wed 8/13

5:45 pm-6:50 pm

Nonstop3h 05m

$88

DallasOntario

DFW - ONT

DFWONT

Dallas/Fort Worth

Wed 9/10

5:50 pm-6:54 pm

Nonstop3h 04m

$90

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 16 results
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The best insider tips for Dallas to Ontario flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Dallas to Ontario trip
Airports
DFW

DFW's Skylink Train connects all terminals efficiently, running every two minutes, perfect for quick terminal transfers.

Read more about DFWby Chris Dong
DAL

DAL offers a streamlined experience with quick security lines and a straightforward layout, ideal for domestic travelers.

Read more about DALby Paul Rubio
ONT

ONT's rental car center offers quick access to I-10, ideal for road trips to Palm Springs or Big Bear.

Read more about ONTby Bill Fink
Our travel experts
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more
Chris Dong

Chris Dong

Expert on DFW

Chris Dong

Chris Dong

Chris is a consumer travel reporter covering aviation, trending travel news, hotels, and loyalty programs—all for leading global publications like Travel + Leisure, The Washington Post, AFAR, and more. In addition to writing, Chris is a video host for Travel + Leisure, giving consumers an inside look at the latest in air travel.

Read more
Paul Rubio

Paul Rubio

Expert on DAL

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more

Best time to book a flight from Dallas to Ontario

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

How far ahead should I book a flight from Dallas to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Dallas to Ontario. Price data was last updated on June 9, 2025.

The best time to book flights from Dallas to Ontario is 71 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Dallas to Ontario (average of $246). Flying from Dallas 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.

What is the cheapest time of day to fly from DFW to ONT?

Find hourly flight availability from Dallas to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Dallas to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 27% versus a flight in the morning.

What is the cheapest day to fly from Dallas to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Dallas to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Dallas to Ontario flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Dallas to Ontario

Explore weekly flight availability from Dallas to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from A78 to ONT are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 on average).

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Dallas 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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 Dallas to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Dallas?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Ontario from Dallas. Booking flights from Dallas to Ontario (ONT) should be relatively easy as there are 16 daily inbound flights from Dallas from 5 different airlines.

  • What are the cheapest airlines flying from Dallas to Ontario round-trip?

    Frontier, at $145, was found to be the cheapest airline from Dallas to Ontario.Alternate airlines to your destination round-trip include Southwest and American Airlines. These flights start at 33% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Dallas to Ontario one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $74. Southwest flights start at $88 while deals on American Airlines start at $90 one-way.

  • What are the most reliable airlines from Dallas to Ontario?

    The top 3 most reliable airlines when flying from Dallas to Ontario are Frontier (75%), Qatar Airways (66%) and American Airlines (61%).

  • What are the cheapest flights from Dallas to Ontario?

    On average you can expect to pay $181 for a flight from Dallas to Ontario. The cheapest flight overall is $49 while the most popular route, (Dallas/Fort Worth - Ontario) is currently priced at $156.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Dallas to Ontario (average of $246). Flying from Dallas 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 Dallas to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Dallas to Ontario

Discover the top 5 airlines that operate flights from Dallas 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$190FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$84Average$153FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$176Average$411FlexibilityNo cancel feeOn-time71%
DeltaCheapest$178Average$281FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$210Average$363FlexibilityNo cancel feeOn-time63%

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