$69 Cheap Flights to Ontario
One-way
Departing from
United States
Going to
Ontario, United States
Ontario (ONT)
United States • March, 2026
95% AI deal score
$623 $132
Ontario (ONT)
United States • March, 2026
94% AI deal score
$623 $143
Ontario (ONT)
United States • March, 2026
94% AI deal score
$623 $143
Ontario (ONT)
United States • March, 2026
94% AI deal score
$623 $147
Top Cheap Flight Deals from United States to Ontario
Recent round-trip flight deals to Ontario
Tue, Apr 14 - Wed, Apr 15
Cheapest
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$56
-$24
30%
Tue, Apr 21 - Wed, Apr 22
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$56
-$24
30%
Mon, Mar 9 - Tue, Mar 10
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$57
-$23
29%
Tue, Mar 31 - Wed, Apr 1
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$56
-$24
30%
Tue, Apr 7 - Wed, Apr 8
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$56
-$24
30%
Mon, Mar 9 - Wed, Mar 11
Las Vegas (LAS) - Ontario (ONT)
Frontier Airlines airlines • Direct
Ontario (ONT) - Las Vegas (LAS)
Frontier Airlines airlines • Direct
$80
$57
-$23
29%
The cheapest time to fly to Ontario
Ready to jet to Ontario on a budget? Check out these popular routes with surprisingly cheap fares (one-way prices):
Facts About Flights from United States to Ontario
To help you plan your journey, here are some quick Ontario flight facts and tips.
Ontario city airports
Ontario International Airport (ONT): A Gateway to Southern California Located in the heart of Southern California, Ontario International Airport (ONT) offers a convenient and increasingly popular alternative to the larger and often more congested Los Angeles International Airport (LAX). ONT boasts a growing list of domestic and international destinations, served by a variety of airlines. Passengers appreciate its modern facilities, shorter security lines, and overall ease of navigation. The airport is easily accessible via major freeways and offers ample parking options, making it a stress-free starting point or arrival point for your travels. Whether you're visiting the Inland Empire, heading to nearby attractions, or connecting to destinations around the globe, Ontario International Airport provides a smooth and efficient travel experience.
Pro tip: search “Ontario (Any)” to see fares to all Ontario airports – sometimes one is cheaper than the others on your dates.
Insights for flights to Ontario
Cheapest airport
Hamilton (YHM)
Looking for a low-key Ontario adventure? Hamilton Airport (YHM) might be your golden ticket! While it's smaller than Toronto Pearson, YHM offers a relaxed vibe and budget-friendly flights, making it a smart choice for savvy travelers. Plus, you're perfectly positioned to explore Hamilton's waterfalls and vibrant arts scene, or take a quick trip to Niagara Falls!
Nonstop vs. 1-stop
20+ cities
Ontario International Airport (ONT) is a secondary airport in the Los Angeles Metropolitan area, and it offers a variety of routes, with popular connections to cities like Sacramento, San Francisco, and Denver, making it a convenient option for travelers looking to bypass the hustle of LAX.
Number of airlines
ONT Airport Deal Stats
Current most discounted routes
Avg. most discounted routes (last 3 months)
ONT airport insights
Best days to catch a deal
Thur, Fri
Based on the data, Saturday and Tuesday appear to be the days when the cheapest deals for Ontario International Airport are most frequently found. You are most likely to find a deal on Saturday as it has the lowest count of 55.
Avg. deal survival time
15.8 hours
Deals from Ontario International Airport survive an average of 15.8 hours. Make sure to book quickly, as deals don't tend to last very long!
Rare deal frequency
11 deals
In the past month, we've identified 11 rare flight deals for Ontario International Airport. These exceptional offers earned an AI Deal Score of 90+, typically arising from mistake fares, special promotions, or ultra-discounts.
Average price drop
-53%
Based on our data, the average price drop for flights arriving at Ontario International Airport is 53.2%. This means you have a good chance of finding significantly cheaper flights to this destination if you monitor prices.
Next 4 weeks: deal forecast
Ontario International Airport Next Month Forecast
The forecast for Ontario International Airport next month shows prices remaining relatively stable. There are no major price drops or increases expected based on current trends.
Top 5 biggest price drops (last 3 months)
Found on February 16
Grand Island - ONT
$750 → $177
76%
Found on February 17
Twin Falls - ONT
$705 → $169
76%
Found on February 17
Ciudad Juárez - ONT
$1,110 → $276
75%
Found on February 16
Mount Hagen - ONT
$6,450 → $1,654
74%
Found on February 18
Fresno - ONT
$930 → $254
73%
Check these nearby airports too
Looking for more options? These airports near ONT sometimes drop rare deals too:
Los Angeles International (LAX)
~9 rare deals/month
Palm Springs International (PSP)
~10 rare deals/month
John Wayne (SNA)
~3 rare deals/month
If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially LAX and PSP for long-haul deal surprises.
When Is the Best Time to Fly from United States to Ontario
Timing is everything when hunting for cheap flights. Here are data-backed insights on the best times to fly to Ontario:
Cheapest month
January
Cheapest month
January is often the cheapest month to fly to Ontario, offering budget-friendly travel options. The city experiences cooler temperatures and fewer tourists during this time. You can explore Ontario's attractions without the crowds and enjoy potential savings on flights and accommodations.
Best day to book
Tuesday
Best day to book
Booking your flight on a Tuesday can often lead to significant savings. Airlines frequently release deals and discounts at the beginning of the week. By monitoring prices and booking on a Tuesday, you increase your chances of securing a cheaper flight to Ontario.
Cheapest days to fly
Wednesday
Cheapest days to fly
Flying to Ontario on a Wednesday is typically the most economical choice. Mid-week flights tend to be less expensive due to lower demand from business travelers. Opting for a Wednesday arrival can free up your budget for enjoying the many attractions Ontario has to offer.
Advance booking sweet spot
2 months
Advance booking sweet spot
The sweet spot for booking flights to Ontario is about two months in advance. This timeframe often strikes a balance between availability and price. Booking around two months out allows you to secure your preferred flight times and potentially snag a better deal before prices start to climb closer to the departure date.
Ontario Airports & Ground Transportation
One big question for travelers is which Ontario airport to fly into. Here’s a quick guide to Ontario’s airports and how to get to the city from each:
Ontario International Airport (ONT)
Ontario International Airport (ONT) is a convenient gateway to Southern California, offering a less hectic alternative to the bustling LAX. With two terminals, it provides a range of amenities including dining and shopping options to keep you occupied before your flight. The airport is located just about 4 miles east of downtown Ontario, making it super accessible. Getting to and from the city is a breeze with readily available taxis, ride-sharing services, and rental cars. Plus, the Metrolink train offers a direct connection for a smooth journey.
Tip: Arrive a little early to explore the local eateries; you might find your new favorite pre-flight snack!
Los Angeles International Airport (LAX)
Los Angeles International Airport (LAX) is one of the world's busiest airports. It offers tons of international and domestic flights. Located about 38 miles west of Ontario, it's a major hub with a vast array of shops, restaurants, and lounges. Getting to Ontario from LAX requires a bit of planning, with options like the FlyAway bus to Union Station followed by a Metrolink train, or ride-sharing and taxi services for a more direct route. Be sure to factor in LA's infamous traffic!
What to Do in Ontario
Ontario isn’t just about getting there – it’s about enjoying the country once you arrive! Here are some top things to do in Ontario, organized by interest:
Sightseeing & landmarks
Ontario is filled with many sightseeing and landmarks options. From historic buildings to natural wonders, there is something to see for everyone! If you're into architecture, nature, or history, Ontario has it all!
Arts & culture
If you're an art lover, Ontario has many galleries and museums for you to explore, such as the Art Gallery of Ontario! And if you're into performing arts, check out a show at one of the many theaters and music venues.
Food & nightlife
Foodies, rejoice! Ontario has a diverse culinary scene, from farm-to-table restaurants to international cuisine. When the sun goes down, Ontario's nightlife comes alive with bars, clubs, and live music venues!
Shopping & fashion
Shopaholics, get ready to shop 'til you drop! Ontario has a mix of trendy boutiques, high-end department stores, and outlet malls.
Nearby getaways
Need a break from the city? Ontario has many nearby getaways, like Niagara Falls or Prince Edward County! Whether you're looking for a relaxing spa weekend, wine country escape, or outdoorsy adventure, Ontario has many options!
No matter your interest – be it art, food, nightlife, or nature – Ontario has something for everyone. And the best part? Many events and attractions refresh throughout the year, so there’s always something new to experience each visit.
Events in Ontario This Month
lytle creek cc | billiards club | tue | 13-17yrs
Whether you're a seasoned pro or a beginner, come enjoy a game of billiards. Pre-registration is required online or in person.
lytle creek cc | karate | beginner | 10:00am | 6-11yrs
This four-week youth sports program teaches fundamental karate skills in a non-competitive environment. Children under six must be accompanied by an adult.
hernandez cc | adult master chef | sat | 18+yrs
Join our adult cooking class for a delicious and educational experience. Perfect for beginners and experienced cooks, these hands-on classes will teach you essential cooking techniques and expand your culinary skills.
crafty corner
Meet with others to discuss and create a variety of basic crafts at the Dales Senior Center Arts & Crafts Room.
Ontario Weather
Weather in Ontario
Fri, Feb 20
10%
13° 4°
10%
Sat, Feb 21
Frequently Asked Questions About Flights to Ontario
Pro Tips for Finding Cheap Flights to Ontario
Finally, to wrap up, here’s a cheat sheet of pro tips that experienced travelers use to save on Ontario flights:
Be Flexible with Your Dates: Flying on Tuesdays or Wednesdays is often cheaper than flying on weekends. Plus, who doesn't love a mid-week getaway?
Consider Alternative Airports: Ontario International Airport (ONT) isn't the only option! Check flights into nearby airports like LAX or even smaller regional ones for potential savings.
