Cheap flights to Ontario, CA from $35

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 4/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
WAS — ONT
Mar 24 — Mar 311

Flights to Ontario in 2024

Find the latest flights to Ontario in 2024, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data was last updated on March 19, 2024.

Popular in

December

Cheapest in

February

Average price

$356

Round-trip from

$122

One-way from

$86
High demand for flights, 7% potential price rise
Best time to find cheap flights, 3% potential price drop
Average for round-trip flights in March 2024
From New York to Los Angeles
One-way flight from New York to Ontario (ONT)

Cheap flights to Ontario in March & April 2024

Discover affordable flights and deals to Ontario in March and April 2024. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data was last updated on March 19, 2024.
The following deals offer some of the lowest prices we've found on flights heading to Ontario in March and April 2024. If these deals fall outside of your budget, be sure to come back soon as prices update often.
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Mon 4/2212:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/17$41
Thu 4/115:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$42
Sat 4/135:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$45
Sun 4/145:06 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$46
Tue 4/1610:10 amSFO - ONT
Nonstop1h 29mFrontier
Wed 4/247:58 amONT - SFO
Nonstop1h 27mFrontier
Deal found 3/18$48
Wed 4/105:01 amDEN - ONT
Nonstop2h 25mFrontier
Wed 4/177:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$48
Fri 4/1210:35 pmDEN - ONT
Nonstop2h 24mFrontier
Sat 4/1312:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$50
Tue 4/23:08 pmSFO - ONT
Nonstop1h 28mFrontier
Tue 4/912:48 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 3/18$51
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Wed 4/177:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$51

Ontario 2024 flight deals

Explore flight deals for Ontario in 2024, offering the best prices and options to suit your preferences. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data were last updated on March 19, 2024.
These are some of the best deals we've found on flights to Ontario in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 4/165:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 4/207:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$38
Mon 4/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Sun 4/2112:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$39
Mon 4/155:01 amDEN - ONT
Nonstop2h 25mFrontier
Sat 4/207:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$40
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Mon 4/2212:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/17$41
Thu 4/115:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$42
Sat 4/135:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$45
Sun 4/145:06 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/1612:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$46
Tue 4/1610:10 amSFO - ONT
Nonstop1h 29mFrontier
Wed 4/247:58 amONT - SFO
Nonstop1h 27mFrontier
Deal found 3/18$48
Wed 4/105:01 amDEN - ONT
Nonstop2h 25mFrontier
Wed 4/177:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$48

Flights to Ontario departing soon

Discover available last-minute flight options to Ontario, providing immediate availability and potentially lower prices. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data was last updated on March 19, 2024.
Browse through available last-minute flights traveling to Ontario. Tip: double check your flight details before making your reservation.
Tue 3/263:08 pmSFO - ONT
Nonstop1h 28mFrontier
Thu 3/288:40 amONT - SFO
Nonstop1h 33mFrontier
Deal found 3/17$76
Thu 3/2811:03 amSFO - ONT
Nonstop1h 27mFrontier
Mon 4/810:58 amONT - SFO
Nonstop1h 32mFrontier
Deal found 3/17$78
Tue 3/263:08 pmSFO - ONT
Nonstop1h 28mFrontier
Sun 3/318:35 amONT - SFO
Nonstop1h 33mFrontier
Deal found 3/17$80
Mon 3/251:20 pmSFO - ONT
Nonstop1h 25mFrontier
Sat 3/3012:55 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 3/18$81
Sun 3/2411:03 amSFO - ONT
Nonstop1h 27mFrontier
Tue 4/912:48 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 3/17$82
Tue 3/268:52 pmSFO - ONT
1 stop11h 18mFrontier
Wed 4/107:58 amONT - SFO
Nonstop1h 27mFrontier
Deal found 3/17$83
Mon 3/251:20 pmSFO - ONT
Nonstop1h 25mFrontier
Sat 6/17:36 amONT - SFO
Nonstop1h 26mFrontier
Deal found 3/18$84
Wed 3/273:19 pmSFO - ONT
Nonstop1h 28mFrontier
Fri 3/2912:43 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 3/17$85
Mon 3/251:20 pmSFO - ONT
Nonstop1h 25mFrontier
Sun 3/318:35 amONT - SFO
Nonstop1h 33mFrontier
Deal found 3/17$88

One-way flights to Ontario

Explore one-way flight options to Ontario for greater flexibility in your travel plans. Find up-to-date pricing and availability for one-way flights. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data was last updated on March 19, 2024.
Choose from one of these one-way flights departing to Ontario. Reserve a round-trip flight to Ontario instead by utilizing the search form above.
Mon 4/11:20 pmSFO - ONT
Nonstop1h 25mFrontier
Deal found 3/17$35
Thu 4/2510:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 3/18$36
Sat 6/155:15 amSFO - ONT
Nonstop1h 21mFrontier
Deal found 3/17$37
Wed 7/241:37 pmSEA - ONT
Nonstop2h 37mFrontier
Deal found 3/17$39
Sun 4/710:58 amSFO - ONT
Nonstop1h 27mFrontier
Deal found 3/17$39
Fri 4/1910:35 pmDEN - ONT
Nonstop2h 24mFrontier
Deal found 3/17$39
Wed 7/241:37 pmSEA - ONT
Nonstop2h 37mFrontier
Deal found 3/17$40
Mon 3/251:20 pmSFO - ONT
Nonstop1h 25mFrontier
Deal found 3/16$40
Fri 5/310:15 amSFO - ONT
Nonstop1h 29mFrontier
Deal found 3/17$42

Direct flights to Ontario

Tue 4/23:08 pmSFO - ONT
Nonstop1h 28mFrontier
Tue 4/912:48 pmONT - SFO
Nonstop1h 30mFrontier
Deal found 3/18$51
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Wed 4/177:26 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$51
Sat 4/1310:35 pmDEN - ONT
Nonstop2h 24mFrontier
Tue 4/167:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$52
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Fri 4/1212:59 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$53
Tue 4/23:08 pmSFO - ONT
Nonstop1h 28mFrontier
Wed 4/247:58 amONT - SFO
Nonstop1h 27mFrontier
Deal found 3/18$54
Tue 4/910:35 pmDEN - ONT
Nonstop2h 34mFrontier
Thu 4/1112:56 amONT - DEN
Nonstop2h 24mFrontier
Deal found 3/18$55
Wed 4/1010:15 amSFO - ONT
Nonstop1h 29mFrontier
Sat 4/135:59 pmONT - SFO
Nonstop1h 28mFrontier
Deal found 3/18$56
Fri 5/1710:20 pmDEN - ONT
Nonstop2h 19mFrontier
Tue 5/211:32 pmONT - DEN
Nonstop2h 30mFrontier
Deal found 3/18$56
Sat 4/275:01 amDEN - ONT
Nonstop2h 25mFrontier
Tue 4/307:16 amONT - DEN
Nonstop2h 20mFrontier
Deal found 3/18$57

Find flights to Ontario within your budget

Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 3,145,932 searches and data was last updated on March 19, 2024.

Fly from

Any airport

Budget

$38 - $137

Route

Depart

Return

Price

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Tue 4/16

Nonstop2h 24m

Ontario

Tue 4/23

Nonstop2h 20m

$38

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sat 4/27

Nonstop2h 25m

Ontario

Sat 4/27

Nonstop2h 24m

$39

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Fri 4/12

Nonstop2h 24m

Ontario

Wed 4/17

Nonstop2h 24m

$40

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Tue 4/9

Nonstop2h 34m

Ontario

Mon 4/22

Nonstop2h 24m

$41

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Thu 4/11

Nonstop2h 25m

Ontario

Tue 4/16

Nonstop2h 24m

$42

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sat 4/13

Nonstop2h 25m

Ontario

Tue 4/16

Nonstop2h 24m

$45

Denver IntlOntario

DEN - ONT

DENONT

Denver Intl

Sun 4/14

Nonstop2h 25m

Ontario

Tue 4/16

Nonstop2h 24m

$46

Seattle/Tacoma IntlOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 4/10

1 stop11h 53m

Ontario

Wed 4/17

Nonstop2h 45m

$129

Seattle/Tacoma IntlOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

Wed 4/17

Nonstop2h 42m

Ontario

Wed 4/24

Nonstop2h 55m

$137

Flights are sorted by cheapest first

Deals found on 3/17

Average price of flights to Ontario by month

Plan your trip to Ontario by taking into account the cheapest months to travel. The average price of a one-way flight to Ontario is currently $39 while a round-trip flight costs $62. Price data was last updated on March 10, 2024.

Currently, October is the cheapest month in which you can book a flight to Ontario (average of $238). Flying to Ontario in June will prove the most costly (average of $357). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

January

$271

February

$287

March

$281

April

$306

May

$282

June

$357

July

$332

August

$288

September

$258

October

$238

November

$268

December

$271

Temperature and rainfall in Ontario by month

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

LAX

Temperature

57.2 - 73.4 °F

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

When is the best time to book a flight to Ontario?

Use this chart to determine the optimal time to book a round-trip flight to Ontario. Price data was last updated on January 28, 2024.
The price you pay for your flight to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 15 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly to Ontario?

Use this chart to determine the cheapest time to fly round-trip to Ontario. Price data was last updated on March 17, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Users looking for the lowest fares to Ontario should consider flying on Wednesday at noon, when prices are typically cheapest. Budget-minded travelers will want to avoid Sunday evenings, when prices are usually at their highest.
Search Deals

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 19, 2024.
See what other customers who have flown with Frontier, Delta and Alaska Airlines to Ontario have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Southwest
8.2
Very good
6,382 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
9,147 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

8.1
Very good
11,551 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.7
Good
4,921 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

7.6
Good
4,166 reviews
Southwest
8.2
Very good
6,382 reviews

Boarding

8.3

Overall

8.2

Crew

8.8

Entertainment

7.9

Food

7.4

Comfort

8.1

Reviews

1 / 10

The flight attendant on the flight was extremely unprofessional and obnoxious. He treated the entire plane as if we were on a seventh grade camping trip. He thought he was funny but was actually rude to us while we were on the ground waiting to continue to our final stop. It was like being stuck with a bad comedian for four solid hours. We flew from Chicago to Long Beach to Reno over 5 hours and they did not have any food other then graham crackers. Because of being delayed no one had time to get food in the airport between flights. Terrible experience and Southwest should look into this crew member.

Ontario, CA airport overview

At just 2.3 miles (3.7km) east of downtown Ontario, Ontario International Airport (ONT) is a small but well-equipped alternative to Los Angeles Airport and John Wayne Airport for passengers flying to California.

The number of flights to Ontario International Airport has been declining steadily in recent years (there were 4.8 million passengers in 2010, but the terminals are built to handle twice that) – some say due to the lack of direct flights to major destinations, in comparison with other airports nearby. However, those who use the airport agree that it is a convenient alternative, well connected to nearby air fields and towns, easy to get in and out of, clean and with good basic facilities.

  • How long is the flight to Ontario?

    Since Ontario doesn’t have its own airport, you can’t fly directly into this city. However, you can fly directly to Los Angeles International Airport, which is the closest airport to Ontario. Flight times from the United States to Los Angeles range from 1h-16h. The quickest flight from Philadelphia International Airport is 5h 37m, while the fastest flight from Boston International Airport is 6h 10m. The shortest flight from John F. Kennedy Airport is 5h 54. However, some flights may take as long as 16 hours, depending on the number of layovers and the duration of each layover.

  • Where can you get direct flights to Ontario from the United States?

    While you won’t be able to find direct, nonstop Ontario flight deals, you can find numerous direct flights to Los Angeles International Airport, which is the closest airport to Ontario. One example of an airport that services direct flights to Los Angeles is George Bush Intercontinental Airport, which offers airlines like Unites, American Airlines, and Alaska Airlines. San Francisco International Airport, Liberty International Airport, and Philadelphia International Airport also offer direct flights to Los Angeles. Likewise, you can find direct flights to Los Angeles at John F. Kennedy International Airport and Boston International Airport.

  • How do you get from Los Angeles International Airport(s) to the city centre of Ontario, Canada?

    Luckily for you, there are numerous ways to get from Los Angeles Airport to Ontario. For example, once you arrive at Los Angeles Airport, you can quickly grab a taxicab that will take you directly to your destination in just under one hour. You can also take a bus from Los Angeles Airport to L.A. Union Station and then take another bus from Union Station to Pomona Transit Center, which takes a little over two hours and costs under $17.

  • What are some things to do in Ontario?

    One of the best things about visiting Ontario, California is the fact that there are so many things to do while you’re here. In particular, once you’re in Ontario, you can visit movie theaters, room escape games, comedy clubs, and gaming centers. Additionally, this city has shopping malls like Graber Olive House, Ontario Mills, Logan’s Candies, and Treasures N Junk. Another popular venue is the Scandia water park, which can be fun, exciting, and memorable for people of all ages. Likewise, this city contains spa & wellness centers like Salt Oasis, Massage Green Spa, Massage By Laurelle & Medical Spa, and Mint Leaf Thai Massage, which make it easy to stay relaxed while you’re here. You can also grab a drink at facilities like San Antonio Winery, Rescue Brewing Company, Kings Brewing Company, and Dale Bros. Brewery. And if you’re interested in visiting educational museums, you’ll love Planes of Fame Air Museum, Museum of History and Art, Cooper Regional History Museum, and Chaffey Comunity Museum of Art. Other popular landmarks include Citizens Business Bank Arena, K1 Speed Ontario, and Madonna of the Trail.

  • Do I need a passport or visa to fly to Ontario?

    If you’re U.S. citizen, you don’t need a visa to fly to Ontario, California. However, it’s recommended that you always fly with a valid passport.

  • What does ONT mean?

    ONT stands for Ontario Airport. Codes like this one are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

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

    If you book a flight to Ontario, you will be flying into Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. On average, Ontario has 2 flights from New York per day from 9 airlines.

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.

Search flights to Ontario by cabin class

Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Classfrom $498/person
Prem Econ Classfrom $282/person
Economy Classfrom $16/person

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights to Ontario?

Cheapflights helps you search for flights to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to Ontario?

Cheapflights simply makes it quick and affordable to book flights to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights to Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights to Ontario, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Ontario flights so you can book your flight when prices are ideal. Enable price alerts by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.