What are the most popular destinations to fly to from Ontario?

This month, the top selected destinations from Ontario are Denver, Dallas/Fort Worth Airport, Guadalajara. Throughout the year, Dallas/Fort Worth Airport, Denver, Guadalajara are some of the top choices made by users flying from Ontario.

What is the cheapest flight from Ontario to anywhere?

Users have flown out of Ontario for as low as $28 to San Francisco (prices may vary depending on the airline and departure time). On average, users have booked flights for $543 to fly from Ontario.

What are the cheapest airlines flying from Ontario to anywhere?

Over the past few days, we've found that Frontier, Spirit Airlines, and United Airlines have the cheapest prices from Ontario. Frontier flights from Ontario to Atlanta Hartsfield-Jackson ($20), Spirit Airlines flights from Ontario to Atlanta Hartsfield-Jackson ($22), and United Airlines flights from Ontario to Abuja ($58).

What is the cheapest premium economy flight from Ontario?

Options for some of the cheapest premium economy flights from Ontario we have found on Cheapflights are as follows: Fly from Ontario to Las Vegas starting at $73 Fly from Ontario to Salt Lake City starting at $389 Fly from Ontario to Guadalajara starting at $433 Fly from Ontario to Portland starting at $718

What is the cheapest first class flight from Ontario?

If you’re looking for a cheap first-class flight from Ontario, consider Las Vegas. Prices start at $78 so you can fly first-class even on a budget.

What is the cheapest month to fly from Ontario?

January is currently the cheapest month to fly from Ontario . At this moment in time June is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.

Where are the cheapest places to fly to from Ontario?

Check out the cheapest flights from Ontario to embark to: Fly from Ontario to San Francisco from $57 round trip Fly from Ontario to Las Vegas from $58 round trip Fly from Ontario to Phoenix from $97 round trip Fly from Ontario to Oakland from $97 round trip Fly from Ontario to Denver from $99 round trip

$39+ Flights from Ontario

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What to know about flights from Ontario

Cheapest one-way flight	$30
Cheapest round-trip flight	$50
Cheapest airline	LEVEL
Most popular destination	Las Vegas Harry Reid Intl (LAS)
Good round-trip deal	$113 or less
Good one-way deal	$65 or less

The cheapest one-way flight from Ontario is currently to Las Vegas Harry Reid Intl.

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The cheapest round-trip flight from Ontario is currently to Spokane.

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On average, LEVEL currently has the cheapest one-way flight from Ontario (avg. price of $677).

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Las Vegas Harry Reid Intl (LAS) is currently the most popular flight destination from Ontario (average round-trip price of $147).

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Price to beat on a round-trip flight from Ontario.

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Price to beat on a one-way flight from Ontario.

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Find flights from Ontario

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on June 26, 2025.

Mon 8/46:39 pmONT - SFO

Nonstop1h 27mUnited Airlines

Fri 8/89:25 pmSFO - ONT

Nonstop1h 27mUnited Airlines

Deal found 6/25$57

Fri 7/189:41 pmONT - SFO

Nonstop1h 33mFrontier

Mon 7/2110:11 pmSFO - ONT

Nonstop1h 29mFrontier

Deal found 6/26$77

Sun 7/66:00 amONT - LAS

Nonstop1h 13mFrontier

Wed 7/165:18 pmLAS - ONT

Nonstop1h 09mFrontier

Deal found 6/25$78

Fri 7/1812:59 amONT - DEN

Nonstop2h 20mFrontier

Wed 7/2310:29 pmDEN - ONT

Nonstop2h 21mFrontier

Deal found 6/25$99

Mon 8/43:20 pmONT - LAS

Nonstop1h 05mSouthwest

Fri 8/87:10 amLAS - ONT

Nonstop1h 05mSouthwest

Deal found 6/25$100

Mon 7/215:21 pmONT - SEA

1 stop7h 13mFrontier

Wed 7/231:42 pmSEA - ONT

Nonstop2h 54mFrontier

Deal found 6/26$128

Mon 8/412:59 amONT - IAH

1 stop7h 25mFrontier

Sun 8/1010:04 pmIAH - ONT

1 stop13h 09mFrontier

Deal found 6/26$135

Mon 7/2112:59 amONT - DEN

Nonstop2h 20mMultiple Airlines

Tue 7/296:00 amDEN - ONT

1 stop8h 26mMultiple Airlines

Deal found 6/24$152

Tue 9/165:45 amONT - SFO

1 stop4h 05mSouthwest

Wed 9/1712:45 pmSFO - ONT

2 stops8h 00mSouthwest

Deal found 6/23$156

Tue 8/195:10 amONT - DEN

Nonstop2h 17mUnited Airlines

Wed 8/207:25 pmDEN - ONT

Nonstop2h 18mUnited Airlines

Deal found 6/25$157

Sat 9/135:35 amONT - DEN

Nonstop2h 10mSouthwest

Tue 9/168:30 amDEN - ONT

1 stop5h 40mSouthwest

Deal found 6/24$167

Wed 9/103:04 pmONT - SEA

Nonstop2h 40mAlaska Airlines

Wed 9/173:48 pmSEA - ONT

Nonstop2h 40mAlaska Airlines

Deal found 6/26$177

Best flights from Ontario
Discover carefully curated flight deals from Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2025.

Mon 8/46:39 pmONT - SFO

Nonstop1h 27mUnited Airlines

Fri 8/89:25 pmSFO - ONT

Nonstop1h 27mUnited Airlines

Deal found 6/25$57

Fri 7/189:41 pmONT - SFO

Nonstop1h 33mFrontier

Mon 7/2110:11 pmSFO - ONT

Nonstop1h 29mFrontier

Deal found 6/26$77

Mon 8/43:20 pmONT - LAS

Nonstop1h 05mSouthwest

Fri 8/87:10 amLAS - ONT

Nonstop1h 05mSouthwest

Deal found 6/25$100

Mon 7/2112:59 amONT - DEN

Nonstop2h 20mMultiple Airlines

Tue 7/296:00 amDEN - ONT

1 stop8h 26mMultiple Airlines

Deal found 6/24$152

Sun 7/66:00 amONT - LAS

Nonstop1h 13mFrontier

Wed 7/165:18 pmLAS - ONT

Nonstop1h 09mFrontier

Deal found 6/25$78

Wed 9/103:04 pmONT - SEA

Nonstop2h 40mAlaska Airlines

Wed 9/173:48 pmSEA - ONT

Nonstop2h 40mAlaska Airlines

Deal found 6/26$177

Mon 8/412:55 pmONT - LAS

1 stop5h 03mAmerican Airlines

Fri 8/81:00 pmLAS - ONT

1 stop4h 52mAmerican Airlines

Deal found 6/24$187

Fri 7/255:59 pmONT - SEA

Nonstop2h 46mDelta

Tue 7/297:30 amSEA - ONT

Nonstop2h 55mDelta

Deal found 6/26$217

Fri 7/1812:59 amONT - DEN

Nonstop2h 20mFrontier

Wed 7/2310:29 pmDEN - ONT

Nonstop2h 21mFrontier

Deal found 6/25$99

Fri 8/16:58 pmONT - SEA

Nonstop2h 39mHawaiian Airlines

Wed 8/65:25 amSEA - ONT

1 stop3h 58mHawaiian Airlines

Deal found 6/24$227

Wed 9/310:56 pmONT - JFK

Nonstop5h 22mJetBlue

Wed 9/176:35 pmJFK - ONT

Nonstop5h 54mJetBlue

Deal found 6/25$257

Mon 7/215:21 pmONT - SEA

1 stop7h 13mFrontier

Wed 7/231:42 pmSEA - ONT

Nonstop2h 54mFrontier

Deal found 6/26$128

Last-minute flights from Ontario
Discover last-minute flight deals departing from Ontario. Data last updated June 26, 2025 and is based on user searches.

Tue 7/14:50 pmONT - SFO

1 stop5h 41mAmerican Airlines

Thu 7/312:28 pmSFO - ONT

1 stop5h 44mAmerican Airlines

Deal found 6/25$222

Tue 7/16:25 amONT - SEA

Nonstop2h 52mDelta

Wed 7/3010:43 amSEA - ONT

Nonstop2h 51mDelta

Deal found 6/25$247

Wed 7/27:00 amONT - LAS

Nonstop1h 09mFrontier

Sat 7/58:45 pmLAS - ONT

Nonstop1h 07mFrontier

Deal found 6/25$78

Wed 7/21:19 pmONT - SFO

Nonstop1h 27mUnited Airlines

Tue 7/84:16 pmSFO - ONT

Nonstop1h 27mUnited Airlines

Deal found 6/24$177

Wed 7/212:59 amONT - DEN

Nonstop2h 19mMultiple Airlines

Wed 7/96:00 amDEN - ONT

1 stop9h 46mMultiple Airlines

Deal found 6/25$267

Fri 7/412:59 amONT - DEN

Nonstop2h 20mFrontier

Sat 7/127:49 amDEN - ONT

Nonstop2h 20mFrontier

Deal found 6/26$113

Fri 7/49:41 pmONT - SFO

Nonstop1h 34mFrontier

Mon 7/1410:11 pmSFO - ONT

Nonstop1h 29mFrontier

Deal found 6/24$120

Fri 7/412:48 pmONT - IAH

Nonstop3h 30mFrontier

Fri 7/115:09 pmIAH - ONT

Nonstop3h 18mFrontier

Deal found 6/25$177

Fri 7/48:09 pmONT - JFK

1 stop12h 46mFrontier

Sat 7/126:59 amJFK - ONT

1 stop12h 21mFrontier

Deal found 6/26$241

Fri 7/42:50 pmONT - SFO

1 stop5h 15mSouthwest

Mon 7/75:15 amSFO - ONT

1 stop5h 10mSouthwest

Deal found 6/24$268

Fri 7/412:59 amONT - ORD

1 stop21h 11mFrontier

Mon 7/149:56 pmORD - ONT

1 stop25h 56mFrontier

Deal found 6/26$271

Sat 7/510:03 amONT - SEA

Nonstop2h 50mFrontier

Wed 7/161:42 pmSEA - ONT

Nonstop2h 54mFrontier

Deal found 6/25$160

One-way flights from Ontario
Search for one-way flight options from Ontario. Find affordable one-way fares based on user searches. Data last updated June 26, 2025.

Fri 7/2512:59 amONT - ORD

1 stop21h 11mFrontier

Deal found 6/26$45

Tue 10/79:00 amONT - LAS

Nonstop1h 05mSouthwest

Deal found 6/25$49

Tue 9/168:00 amONT - LAS

Nonstop1h 12mFrontier

Deal found 6/25$51

Mon 9/229:41 pmONT - SFO

Nonstop1h 29mFrontier

Deal found 6/25$53

Wed 7/301:19 pmONT - SFO

Nonstop1h 27mUnited Airlines

Deal found 6/25$59

Wed 8/2712:59 amONT - DEN

Nonstop2h 20mFrontier

Deal found 6/24$64

Fri 7/2512:59 amONT - SEA

1 stop22h 43mFrontier

Deal found 6/26$66

Sat 8/97:00 amONT - IAH

1 stop7h 14mFrontier

Deal found 6/26$68

Wed 7/307:22 pmONT - ORD

1 stop8h 41mMultiple Airlines

Deal found 6/26$72

Sat 8/91:55 pmONT - SFO

1 stop3h 55mSouthwest

Deal found 6/25$76

Sat 8/162:21 pmONT - DEN

1 stop8h 38mAlaska Airlines

Deal found 6/25$88

Tue 9/24:54 pmONT - DEN

1 stop4h 13mAmerican Airlines

Deal found 6/26$89

International flights from Ontario
Find cheap international flights from Ontario based on historic user searches and pricing. Information updated on June 26, 2025.

Wed 8/206:04 amONT - DEL

2 stops26h 56mUnited Airlines

Wed 10/811:35 pmDEL - ONT

2 stops25h 46mUnited Airlines

Deal found 6/26$657

Mon 11/36:38 pmONT - DXB

2 stops41h 27mAir Canada

Fri 11/72:05 amDXB - ONT

2 stops32h 40mAir Canada

Deal found 6/25$666

Thu 9/186:04 amONT - DXB

2 stops25h 31mUnited Airlines

Thu 11/62:15 amDXB - ONT

2 stops30h 02mUnited Airlines

Deal found 6/25$670

Fri 8/296:00 amONT - MNL

2 stops25h 05mKorean Air

Sun 9/1411:30 pmMNL - ONT

2 stops38h 12mKorean Air

Deal found 6/26$754

Mon 9/111:59 pmONT - DEL

2 stops32h 31mAmerican Airlines

Mon 11/1011:55 pmDEL - ONT

2 stops27h 17mAmerican Airlines

Deal found 6/26$761

Wed 10/2212:10 amONT - MNL

1 stop18h 25mChina Airlines

Wed 12/34:55 pmMNL - ONT

1 stop15h 55mChina Airlines

Deal found 6/26$763

Thu 11/205:40 amONT - MNL

2 stops23h 05mUnited Airlines

Mon 1/2611:30 pmMNL - ONT

2 stops53h 03mUnited Airlines

Deal found 6/26$770

Mon 11/311:29 amONT - DXB

2 stops33h 16mDelta

Sat 11/810:40 amDXB - ONT

2 stops41h 34mDelta

Deal found 6/25$771

Tue 11/1810:59 pmONT - CAI

2 stops39h 06mDelta

Fri 11/212:05 amCAI - ONT

2 stops24h 09mDelta

Deal found 6/24$775

Mon 10/69:36 amONT - DXB

2 stops25h 59mMultiple Airlines

Sun 10/1212:50 amDXB - ONT

2 stops27h 50mMultiple Airlines

Deal found 6/24$776

Fri 8/291:15 pmONT - DEL

2 stops24h 10mDelta

Thu 10/163:55 amDEL - ONT

2 stops32h 21mDelta

Deal found 6/25$778

Wed 8/209:50 amONT - DEL

2 stops24h 30mKLM

Tue 10/712:50 amDEL - ONT

2 stops31h 22mKLM

Deal found 6/26$779

Find flights from Ontario within your budget

Fly to

Route

Depart

Return

Price

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Mon 8/4

6:39 pm-8:06 pm

Nonstop1h 27m

San Francisco

Fri 8/8

9:25 pm-10:52 pm

Nonstop1h 27m

$57

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 7/29

7:00 am-9:21 pm

1 stop14h 21m

San Francisco

Wed 7/30

1:09 pm-6:27 pm

1 stop5h 18m

$66

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 7/6

6:00 am-7:13 am

Nonstop1h 13m

Las Vegas Harry Reid Intl

Thu 7/10

7:45 pm-8:52 pm

Nonstop1h 07m

$78

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Tue 7/22

12:59 am-4:19 am

Nonstop2h 20m

Denver Intl

Wed 7/30

10:29 pm-11:50 pm

Nonstop2h 21m

$99

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Mon 8/4

3:20 pm-4:25 pm

Nonstop1h 05m

Las Vegas Harry Reid Intl

Fri 8/8

7:10 am-8:15 am

Nonstop1h 05m

$100

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Tue 7/22

12:59 am-10:24 am

1 stop7h 25m

Houston George Bush Intcntl

Mon 7/28

7:14 pm-4:20 pm

1 stop23h 06m

$117

OntarioSeattle

ONT - SEA

ONTSEA

Ontario

Sun 7/13

10:03 am-12:53 pm

Nonstop2h 50m

Seattle/Tacoma Intl

Fri 7/18

1:42 pm-4:36 pm

Nonstop2h 54m

$134

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Mon 7/21

12:59 am-4:19 am

Nonstop2h 20m

Denver Intl

Tue 7/29

6:00 am-1:26 pm

1 stop8h 26m

$152

OntarioSan Francisco

ONT - SFO

ONTSFO

Ontario

Tue 9/16

5:45 am-9:50 am

1 stop4h 05m

San Francisco

Tue 9/16

12:45 pm-8:45 pm

2 stops8h 00m

$156

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Sat 9/13

5:35 am-8:45 am

Nonstop2h 10m

Denver Intl

Tue 9/16

8:30 am-1:10 pm

1 stop5h 40m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 60 results

...

Ontario travel tips

If you are a member of the military, you can always go to the USO Lounge at Ontario International Airport (ONT), which provides free drinks, snacks, and access to high-speed Wi-Fi. It can be found directly across from Parking Lot F.
Parents will want to take note of the nursing rooms that are scattered throughout Ontario International Airport (ONT). These rooms provide parents with a comfortable place to tend to their children and contain amenities like padded benches, changing tables, and outlets.
Ontario International Airport (ONT) has several dining options to choose from, including a few fast-food restaurants, and sit-down restaurants that serve cuisines like American and Italian.

Best time to book a flight from Ontario

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

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

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

To ensure you get the cheapest price possible for a flight from Ontario, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Ontario (average of $38). Flying from Ontario in June will prove the most costly (average of $91). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

When is the cheapest time to fly from Ontario?

Those who are seeking the cheapest fare on flights departing from Ontario would be wise to consider leaving during Friday mornings when prices are typically at their lowest. When considering other options, price-conscious travelers should avoid Sunday at noon when fares are usually the most expensive.

Which airlines fly from Ontario?

For flights departing from Ontario check dates and pricing for the following: Frontier, Alaska Airlines, Delta, Hawaiian Airlines, Spirit Airlines. These airlines depart to the following popular destinations: Seattle.

What are popular destinations to fly to from Ontario?

Some of the most frequent flights departing from Ontario everyday are: Seattle (151 flights per day), Dallas (136 flights per day), and Salt Lake City (83 flights per day).

Las Vegas Harry Reid Intl

From $43

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is San Francisco, with prices starting at $28. Explore other affordable destinations below.

San Francisco

From $28

Las Vegas Harry Reid Intl

Airline reviews for flights from Ontario

Peruse reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,276 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,964 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.8

Good

2,522 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,838 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Browse thousands of different options on Cheapflights for your next trip

Popular international destinations from Ontario

Flights from Ontario to San Salvador

Flights from Ontario to Guadalajara

Flights from Ontario to San José del Cabo

Flights from Ontario to León

Airports servicing Ontario

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Flights from New York

Flights from Las Vegas

Flights from Los Angeles

Flights from San Francisco

Flights from Fort Lauderdale

Flights from Washington, D.C.

Flights from Denver

Flights from Seattle

Popular Round-Trip Flight Destinations

Flights from Ontario to Denver

Flights from Ontario to Seattle

Flights from Ontario to Las Vegas

Flights from Ontario to San Francisco

Flights from Ontario to Atlanta

Flights from Ontario to Portland

Flights from Ontario to San Salvador

Flights from Ontario to Salt Lake City

Flights from Ontario to Guadalajara

Flights from Ontario to Honolulu

Flights from Ontario to Charlotte

Flights from Ontario to Sacramento

Flights from Ontario to San José del Cabo

Flights from Ontario to Oakland

Flights from Ontario to San Jose

Flights from Ontario to Baltimore

Flights from Ontario to Nashville

Flights from Ontario to Austin

Related info for your journey

What are the most popular destinations to fly to from Ontario?
This month, the top selected destinations from Ontario are Denver, Dallas/Fort Worth Airport, Guadalajara. Throughout the year, Dallas/Fort Worth Airport, Denver, Guadalajara are some of the top choices made by users flying from Ontario.
What is the cheapest flight from Ontario to anywhere?
Users have flown out of Ontario for as low as $28 to San Francisco (prices may vary depending on the airline and departure time). On average, users have booked flights for $543 to fly from Ontario.
What are the cheapest airlines flying from Ontario to anywhere?
Over the past few days, we've found that Frontier, Spirit Airlines, and United Airlines have the cheapest prices from Ontario. Frontier flights from Ontario to Atlanta Hartsfield-Jackson ($20), Spirit Airlines flights from Ontario to Atlanta Hartsfield-Jackson ($22), and United Airlines flights from Ontario to Abuja ($58).
What is the cheapest premium economy flight from Ontario?
Options for some of the cheapest premium economy flights from Ontario we have found on Cheapflights are as follows:
Fly from Ontario to Las Vegas starting at $73
Fly from Ontario to Salt Lake City starting at $389
Fly from Ontario to Guadalajara starting at $433
Fly from Ontario to Portland starting at $718
What is the cheapest first class flight from Ontario?
If you’re looking for a cheap first-class flight from Ontario, consider Las Vegas. Prices start at $78 so you can fly first-class even on a budget.
What is the cheapest month to fly from Ontario?
January is currently the cheapest month to fly from Ontario. At this moment in time June is the most expensive month. These prices are determined by multiple factors and booking in advance can help keep costs down if your schedule is not as flexible.
Where are the cheapest places to fly to from Ontario?
Check out the cheapest flights from Ontario to embark to:
Fly from Ontario to San Francisco from $57 round trip
Fly from Ontario to Las Vegas from $58 round trip
Fly from Ontario to Phoenix from $97 round trip
Fly from Ontario to Oakland from $97 round trip
Fly from Ontario to Denver from $99 round trip
What parking options are available at Ontario International Airport (ONT)?
There are a few parking options available at Ontario International Airport (ONT), including over five different lots that provide short and long-term parking. You can also opt for premium parking, which will put you closer to your terminal.
How can I go from downtown Ontario to Ontario International Airport (ONT)?
If you drive from downtown Ontario to Ontario International Airport (ONT), it will take around 5 to 10 minutes. With public transportation, like bus line 61, it will take you around 30 to 35 minutes instead.
Is there a hotel located directly at Ontario International Airport (ONT)?
Ontario International Airport (ONT) does not have its own on-site hotel, but there are quite a few that are just a short distance from the transportation hub. The DoubleTree by Hilton Hotel Ontario Airport has a free shuttle and is less than a 15-minute drive away.
Does Ontario International Airport (ONT) have any pet relief areas?
Ontario International Airport (ONT) has pet relief areas that are both indoors and outdoors. Indoor areas can be found in Terminals 2 and 4, while outdoor areas are located at the far end of each terminal building.

See more FAQs

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$39+ Cheap flights from Ontario

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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.

What to know about flights from Ontario

Cheapest one-way flight

Cheapest round-trip flight

Cheapest airline

Most popular destination

Good round-trip deal

Good one-way deal

Find flights from Ontario

Cheapest flights from OntarioExplore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on June 26, 2025.

Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on June 26, 2025.

Find flights from Ontario within your budget

Ontario travel tips

Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from Ontario with our price prediction graph.

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Seattle. Price data was last updated on June 20, 2025.

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

When is the cheapest time to fly from Ontario?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Seattle. Price data was last updated on June 22, 2025.

Which airlines fly from Ontario?

What are popular destinations to fly to from Ontario?

What is the cheapest place to fly to from Ontario?

Airline reviews for flights from Ontario

Peruse reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

Popular international destinations from Ontario

The most popular international flight routes departing from Ontario we’ve come across at this time.

Related info for your journey

What are the most popular destinations to fly to from Ontario?

What is the cheapest flight from Ontario to anywhere?

What are the cheapest airlines flying from Ontario to anywhere?

What is the cheapest premium economy flight from Ontario?

What is the cheapest first class flight from Ontario?

What is the cheapest month to fly from Ontario?

Where are the cheapest places to fly to from Ontario?

What parking options are available at Ontario International Airport (ONT)?

How can I go from downtown Ontario to Ontario International Airport (ONT)?

Is there a hotel located directly at Ontario International Airport (ONT)?

Does Ontario International Airport (ONT) have any pet relief areas?

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Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on June 26, 2025.