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Cheap Flights from New York (LGA) to Ontario (ONT)

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Compare New York LaGuardia to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from New York LaGuardia to Ontario International

Looking for a cheap last-minute deal or the best return flight from New York LaGuardia to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.$327 per passenger.Departing Sat, 24 May, returning Thu, 29 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from New York LaGuardia on Sat, 24 May, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Thu, 29 May, arriving in New York LaGuardia.Price includes taxes and charges.From $327, select.
Ontario.$340 per passenger.Departing Tue, 10 Jun, returning Wed, 11 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from New York LaGuardia on Tue, 10 Jun, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Wed, 11 Jun, arriving in New York LaGuardia.Price includes taxes and charges.From $340, select.
Ontario.$393 per passenger.Departing Fri, 30 May, returning Sat, 7 Jun.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from New York LaGuardia on Fri, 30 May, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Sat, 7 Jun, arriving in New York LaGuardia.Price includes taxes and charges.From $393, select.
Ontario.$420 per passenger.Departing Tue, 23 Sep, returning Tue, 30 Sep.Return flight with United.Outbound indirect flight with United, departs from New York LaGuardia on Tue, 23 Sep, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 30 Sep, arriving in New York LaGuardia.Price includes taxes and charges.From $420, select.
Ontario.$436 per passenger.Departing Sat, 4 Oct, returning Wed, 8 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from New York LaGuardia on Sat, 4 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 8 Oct, arriving in New York LaGuardia.Price includes taxes and charges.From $436, select.
Ontario.$442 per passenger.Departing Tue, 22 Jul, returning Tue, 29 Jul.Return flight with United.Outbound indirect flight with United, departs from New York LaGuardia on Tue, 22 Jul, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 29 Jul, arriving in New York LaGuardia.Price includes taxes and charges.From $442, select.
Ontario.$442 per passenger.Departing Sat, 13 Sep, returning Thu, 2 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from New York LaGuardia on Sat, 13 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 2 Oct, arriving in New York LaGuardia.Price includes taxes and charges.From $442, select.
Ontario.$443 per passenger.Departing Wed, 13 Aug, returning Tue, 19 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from New York LaGuardia on Wed, 13 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 19 Aug, arriving in New York LaGuardia.Price includes taxes and charges.From $443, select.

Find the cheapest month to fly from New York LaGuardia to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like New York LaGuardia to Ontario International flights are currently cheapest in May.
May
from $327
Jun
from $340
Jul
from $442
Aug
from $443
Sep
from $420
Oct
from $436
Nov
from $458
Dec
from $540
Jan
from $807
Feb
from $806
Mar
from $544
Apr
Find prices

New York LaGuardia to Ontario International: Alternative routes

Compare routes from New York LaGuardia to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

New York to Ontario: Flight information

The things to know before you go.
Cheapest flight found$327
Cheapest month to flyMay

Finding cheap flights from New York LaGuardia to Ontario International: Frequently asked questions

The best price we found for a return flight from New York LaGuardia to Ontario International is $327. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from New York LaGuardia to Ontario International. But we found flights with one or more stops from $327.
As of May 2025, there are no flights flying from New York LaGuardia to Ontario International.
The cheapest month to fly from New York LaGuardia to Ontario International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from New York LaGuardia Airport to Ontario International Airport on Saturday, 24 May 2025.
No airlines currently offer direct flights between New York LaGuardia Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Ontario International.

Flying from LaGuardia Airport (LGA) to Ontario International Airport (ONT): what you need to know

  • Ontario is three hours behind New York and observes the UTC-7 timezone.

  • Arrive at the airport on time so you don't miss your LGA to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid a last-minute sprint to the gate.

  • Be prepared for longer lines during popular months like July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will help ensure a smooth travel experience.

  • Think about adding a stopover when booking your ticket from LaGuardia Airport to Ontario International Airport. Simply deselect 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Here's where you can stop between LGA and ONT:

    • Denver International Airport

    • Nashville International Airport

    • Chicago Midway International Airport

How to find the cheapest flights from LaGuardia Airport (LGA) to Ontario International Airport (ONT)

  • The lowest price we've found for a one-way LaGuardia Airport to Ontario International Airport flight is $155. A return ticket is currently $327. Depending on the availability and when you book, these fares may change.

  • To score cheap tickets from LGA to ONT, book in advance. Airlines generally offer lower fares when flights are first made available.

  • Getting cheap flights from LaGuardia Airport to Ontario International Airport is easier if you can be flexible with your trip dates. Use the 'Whole month' function to see the lowest fares across each month and land a great deal.

  • You won't have to check every day to see if fares have gone down when you create a Price Alert. We'll let you know the moment there's a new deal on cheap flights from LGA to ONT.

  • Tailor your flights with filters. Pick your arrival and departure times, airlines and total journey duration. You can also sort your results by 'Best,' 'Fastest' or 'Cheapest' flights from LaGuardia Airport to Ontario International Airport.

Handy information about LaGuardia Airport (LGA)

  • You'll find LGA at Hangar 7 Centre.

  • LaGuardia Airport maintains a solid on-time performance, so flight disruptions are less likely. Departures from LGA arrive at their destination as scheduled 80.0% of the time.

  • Central New York to LaGuardia Airport is around 18 kilometres. Depending on traffic, it'll take you about 25 minutes to get there if you're driving, ride-sharing or catching a cab.

  • Expect a trip time of around 1 hour when using public transport.

  • Booked an early flight from LaGuardia Airport to Ontario International Airport? Avoid the hassle of rushing to the airport (and enjoy a little extra shut-eye) by picking one of these stays near LGA:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • From Ontario International Airport, Ontario is approximately 6 kilometres away. It takes around 10 minutes to drive to the centre.

  • It takes around 1 hour 30 minutes if you're travelling by public transport.

When to fly to Ontario International Airport (ONT)

  • August is the most popular month for flights from LaGuardia Airport to Ontario International Airport. For smaller crowds, head to Ontario in May.

  • The warmest month in Ontario is August, with temperatures ranging between 15ºC (59ºF) and 35ºC (95ºF). Book your flights from LaGuardia Airport to Ontario International Airport in this month if this is the type of weather you enjoy.

  • January has average temperatures of between 4ºC (39ºF) and 23ºC (73ºF). Search for cheap tickets from LGA to ONT sometime then if you want to travel in cooler conditions.

Explore more of United States

  • Ontario has plenty going for it, but there are so many other parts of United States you'll want to see. Around 56 kilometres west of Ontario, a visit to Los Angeles will keep your itinerary packed. Start with leading sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 153 kilometres south of Ontario, San Diego is another essential stop in United States. Experience this destination's highlights firsthand at San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

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Plan the rest of your trip from New York to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.