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

Frontier, at $91, was found to be the cheapest airline from Dallas to Ontario.Alternate airlines to your destination round-trip include American Airlines and Southwest. These flights start at 69% 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 $50. American Airlines flights start at $108 while deals on JetBlue start at $127 one-way.

Weekly flight availability from Dallas to Ontario

The most flights from A78 to ONT are scheduled on a Monday (17 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 on average).

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.

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).

What are the cheapest flights from Dallas to Ontario?

On average you can expect to pay $365 for a flight from Dallas to Ontario. The cheapest flight overall is $97 while the most popular route, (Dallas/Fort Worth - Ontario) is currently priced at $143.

What are the most reliable airlines from Dallas to Ontario?

The top 3 most reliable airlines when flying from Dallas to Ontario are GOL (89%), Frontier (83%) and Volaris (83%).

What are the most popular airlines that fly from Dallas to Ontario?

The most popular airlines flying from Dallas to Ontario are Frontier, American Airlines and Southwest. Something to consider prior to booking your flight.

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 11 daily inbound flights from Dallas from 3 different airlines.

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.

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Cheapflights Tip: The best prices from Dallas to Ontario are usually found in February or January, booked 82 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Find flight deals from Dallas to Ontario

Popular in	July
Cheapest in	February
Average price	$321

Highest demand for flights based on searches. 14% potential increase in price ($50 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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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.

A78-ONT

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.

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Everything you need to know about your flight from Dallas to Ontario

Prices

Airlines

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

The best time to book flights from Dallas to Ontario is 81 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, February is the cheapest month in which you can book a flight from Dallas to Ontario (average of $222). Flying from Dallas to Ontario in July is currently the most expensive (average of $371). 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?

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 afternoon, which can drop the price by up to 10% versus a flight at noon.

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

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

The best insider tips for Dallas to Ontario flights

Cheapflights partnered with top experts to bring you the best recommendations for your Dallas to Ontario trip

Our travel experts

Bill Fink

Expert on ONT

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.

Chris Dong

Expert on DFW

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.

Paul Rubio

Expert on DAL

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 reviews from past customers who have flown Southwest,American Airlines, andFrontier from Dallas to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,194 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Southwest

8.0

Very good

4,194 reviews

Southwest

8.0

Very good

4,194 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

American Airlines

7.0

Good

12,076 reviews

Southwest

8.0

Very good

4,194 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Frontier

5.6

Fair

2,584 reviews

Southwest

8.0

Very good

4,194 reviews

Reviews

1 / 20

10.0

Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Related info for your journey

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 11 daily inbound flights from Dallas from 3 different airlines.
What are the cheapest airlines flying from Dallas to Ontario round-trip?
Frontier, at $91, was found to be the cheapest airline from Dallas to Ontario.Alternate airlines to your destination round-trip include American Airlines and Southwest. These flights start at 69% 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 $50. American Airlines flights start at $108 while deals on JetBlue start at $127 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 GOL (89%), Frontier (83%) and Volaris (83%).
What are the cheapest flights from Dallas to Ontario?
On average you can expect to pay $365 for a flight from Dallas to Ontario. The cheapest flight overall is $97 while the most popular route, (Dallas/Fort Worth - Ontario) is currently priced at $143.
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, February is the cheapest month in which you can book a flight from Dallas to Ontario (average of $222). Flying from Dallas to Ontario in July is currently the most expensive (average of $371). 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.

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Top 3 airlines flying from Dallas to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$91	Average$266	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$194	Average$393	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$204	Average$398	FlexibilityNo cancel fee	On-time63%

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Cheap flights from Dallas to Ontario (ONT)

Find cheap flights from Dallas to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Dallas to Ontario

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

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

The best time to book flights from Dallas to Ontario is 81 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?

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

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 afternoon, which can drop the price by up to 10% versus a flight at noon.

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

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

Weekly flight availability from Dallas to Ontario

The most flights from A78 to ONT are scheduled on a Monday (17 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 on average).

The best insider tips for Dallas to Ontario flights

AI-powered summary based on content written by travel experts. AI can make mistakes.

Cheapflights partnered with top experts to bring you the best recommendations for your Dallas to Ontario trip

Our travel experts

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Southwest,American Airlines, andFrontier from Dallas to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

What are the most reliable airlines from Dallas to Ontario?

What are the cheapest flights from Dallas to Ontario?

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

How can I find direct flights from Dallas to Ontario?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dallas to Ontario

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Complete your trip

Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Dallas to Ontario by cabin class

Find flights from Dallas to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Ontario

Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 22, 2026.

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