What are the cheapest airlines to fly from Mesa 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 $57. Southwest flights start at $58 while deals on JetBlue start at $74 one-way.

Weekly flight availability from Mesa to Ontario

The most flights from MS9 to ONT are scheduled on a Monday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 Mesa to Ontario?

The cheapest flight price from Mesa to Ontario is $58. On average you can expect to pay $285. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $117.

What are the most reliable airlines from Mesa to Ontario?

Consider American Airlines (76%), Porter Airlines (73%) or British Airways (73%) when booking your flight. These represent the most reliable airlines when flying from Mesa to Ontario.

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

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

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

Most people fly into Ontario (ONT) if they book a flight to Ontario from Mesa. On average, Ontario has 9 inbound flights from Mesa per day from 4 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

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

How can I find direct flights from Mesa to Ontario?

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

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

Yes. Cheapflights offers flight deals from Mesa 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.

Find Cheap Flights from Mesa to Ontario

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Cheapflights Tip: The best prices from Mesa to Ontario are usually found in February or April, booked 67 days in advance, depart on a Tuesday or Saturday and return on a Wednesday

Find flight deals from Mesa to Ontario

Popular in	June
Cheapest in	February
Average price	$238

Highest demand for flights based on searches. 9% potential increase in price ($28 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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

Prices

Airlines

What is the cheapest time of day to fly from MS9 to ONT?

One of the essential ways to save on airfare from Mesa to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 31% on airfare.

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

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

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Southwest,JetBlue, andAmerican Airlines from Mesa 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

7.9

Good

4,219 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

7.9

Good

4,219 reviews

Southwest

7.9

Good

4,219 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!

JetBlue

7.1

Good

3,057 reviews

Southwest

7.9

Good

4,219 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

12,171 reviews

Southwest

7.9

Good

4,219 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

5.5

Fair

2,538 reviews

Southwest

7.9

Good

4,219 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 Mesa?
Most people fly into Ontario (ONT) if they book a flight to Ontario from Mesa. On average, Ontario has 9 inbound flights from Mesa per day from 4 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.
What are the cheapest airlines to fly from Mesa 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 $57. Southwest flights start at $58 while deals on JetBlue start at $74 one-way.
What are the most reliable airlines from Mesa to Ontario?
Consider American Airlines (76%), Porter Airlines (73%) or British Airways (73%) when booking your flight. These represent the most reliable airlines when flying from Mesa to Ontario.
What are the cheapest flights from Mesa to Ontario?
The cheapest flight price from Mesa to Ontario is $58. On average you can expect to pay $285. The most popular route, (Phoenix Sky Harbor Intl - Ontario), can usually be booked for $117.
Can I find deals for flights from Mesa to Ontario that include hotel bookings?
Yes. In addition to deals on Mesa to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Mesa to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Mesa to Ontario.
Can I find deals for business class flights from Mesa to Ontario?
Yes. Cheapflights offers flight deals from Mesa 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.

See more FAQs

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Top 4 airlines flying from Mesa to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$96	Average$194	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$117	Average$264	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$134	Average$295	FlexibilityNo cancel fee	On-time71%
JetBlue	Cheapest$192	Average$452	FlexibilityNo cancel fee	On-time62%

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Cheap flights from Mesa, AZ to Ontario (ONT)

Find cheap flights from Mesa 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 Mesa to Ontario

Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from MS9 to ONT?

One of the essential ways to save on airfare from Mesa to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 31% on airfare.

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

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

Weekly flight availability from Mesa to Ontario

The most flights from MS9 to ONT are scheduled on a Monday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Southwest,JetBlue, andAmerican Airlines from Mesa 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.

Related info for your journey

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

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

What are the most reliable airlines from Mesa to Ontario?

What are the cheapest flights from Mesa to Ontario?

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

How can I find direct flights from Mesa to Ontario?

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

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 Mesa to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

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

Search flights from Mesa to Ontario by cabin class

Find flights from Mesa 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 October 15, 2026.

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Top 4 airlines flying from Mesa to Ontario

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