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Cheap Flights from Rochester (ROC) to Ontario (ONT)

Compare Rochester 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 Rochester to Ontario International

Looking for a cheap last-minute deal or the best return flight from Rochester Airport to Ontario International Airport? If you want to travel next month, return fares start from $540. Find the lowest prices on one-way and return tickets right here.
Ontario.$541 per passenger.Departing Sat, 5 Sep, returning Fri, 11 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Sat, 5 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 11 Sep, arriving in Rochester.Price includes taxes and charges.From $541, select.
Ontario.$549 per passenger.Departing Sat, 17 Oct, returning Sat, 24 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Sat, 17 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 24 Oct, arriving in Rochester.Price includes taxes and charges.From $549, select.
Ontario.$558 per passenger.Departing Fri, 5 Feb, returning Tue, 9 Feb.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Fri, 5 Feb, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 9 Feb, arriving in Rochester.Price includes taxes and charges.From $558, select.
Ontario.$558 per passenger.Departing Fri, 27 Nov, returning Sat, 5 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Fri, 27 Nov, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Dec, arriving in Rochester.Price includes taxes and charges.From $558, select.
Ontario.$564 per passenger.Departing Fri, 28 Aug, returning Sat, 5 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Fri, 28 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Sep, arriving in Rochester.Price includes taxes and charges.From $564, select.
Ontario.$571 per passenger.Departing Thu, 5 Nov, returning Sat, 14 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Thu, 5 Nov, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 14 Nov, arriving in Rochester.Price includes taxes and charges.From $571, select.
Ontario.$577 per passenger.Departing Thu, 24 Dec, returning Tue, 29 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Thu, 24 Dec, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 29 Dec, arriving in Rochester.Price includes taxes and charges.From $577, select.
Ontario.$578 per passenger.Departing Fri, 28 Aug, returning Mon, 31 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Fri, 28 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 31 Aug, arriving in Rochester.Price includes taxes and charges.From $578, select.
Ontario.$578 per passenger.Departing Wed, 30 Sep, returning Fri, 2 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Wed, 30 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 2 Oct, arriving in Rochester.Price includes taxes and charges.From $578, select.
Ontario.$580 per passenger.Departing Fri, 8 Jan, returning Mon, 11 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Fri, 8 Jan, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 11 Jan, arriving in Rochester.Price includes taxes and charges.From $580, select.
Ontario.$586 per passenger.Departing Wed, 3 Mar, returning Thu, 11 Mar.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Wed, 3 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 11 Mar, arriving in Rochester.Price includes taxes and charges.From $586, select.
Ontario.$638 per passenger.Departing Wed, 7 Apr, returning Wed, 14 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Rochester on Wed, 7 Apr, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Wed, 14 Apr, arriving in Rochester.Price includes taxes and charges.From $638, select.
Ontario.$700 per passenger.Departing Thu, 31 Dec, returning Sun, 3 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Rochester on Thu, 31 Dec, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sun, 3 Jan, arriving in Rochester.Price includes taxes and charges.From $700, select.

Find the cheapest month to fly from Rochester to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Rochester to Ontario International flights are currently cheapest in September.
Aug
from $578
Sep
from $541
Oct
from $549
Nov
from $571
Dec
from $577
Jan
from $580
Feb
from $558
Mar
from $586
Apr
from $638
May
Find prices
Jun
Find prices
Jul
Find prices

Rochester to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from $540
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San Bernardino Norton AFB

39km from central Ontario
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Santa Ana John Wayne

48km from central Ontario
from $555
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Long Beach Municipal

54km from central Ontario
from $587
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Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from $564
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Los Angeles International

71km from central Ontario
Cheapest
from $363
Search flights

Rochester to Ontario: Flight information

The things to know before you go.
Cheapest flight found$541
Cheapest month to flySeptember

Finding cheap flights from Rochester to Ontario International: Frequently asked questions

The best price we found for a return flight from Rochester to Ontario International is $540. 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 Rochester to Ontario International. But we found flights with one or more stops from $541.
As of August 2026, there are no flights flying from Rochester to Ontario International.
The cheapest month to fly from Rochester to Ontario International is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Rochester Airport to Ontario International Airport on Saturday, 5 September 2026.
No airlines currently offer direct flights between Rochester 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, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Rochester Airport (ROC) to Ontario International Airport (ONT): what you need to know

  • Ontario is three hours behind Rochester and follows the UTC-8 timezone.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Get to the airport on time to catch your ROC to ONT flight.

  • Travelling during a peak month like October? School holidays and other high seasons can mean longer lines and delays at security. Be extra cautious and get there up to four hours ahead of international flights and two hours before domestic departures.

  • If you'd like to explore another city along the way, just uncheck 'Direct flights only' when searching for your ticket from Rochester Airport to Ontario International Airport. Here are the top stopovers between ROC and ONT:

    • Atlanta Hartsfield-Jackson Airport

    • Harry Reid International Airport

    • Chicago Midway Airport

How to find the cheapest flights from Rochester Airport (ROC) to Ontario International Airport (ONT)

  • $270 is the best price for a one-way Rochester Airport to Ontario International Airport flight. A return flight starts from $540. These fares may change based on availability and demand.

  • To find cheap tickets from ROC to ONT, book in advance. Airlines usually offer the most competitive fares when flights are first released.

  • Getting cheap flights from Rochester Airport to Ontario International Airport is easy if you can be flexible with your travel plans. Use the 'Whole month' tool to see the lowest fares across each month and land a great deal.

  • Cut down on the time spent looking for cheap flights from ROC to ONT by setting up a Price Alert. We'll send you an email or notification on the app when a new low fare is offered.

  • Pick your ideal arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Rochester Airport to Ontario International Airport.

Handy information about Rochester Airport (ROC)

  • ROC is located at 1200 Brooks Avenue.

  • Of all flights departing from Rochester Airport, 72% arrive on time at their destination.

  • To get to Rochester Airport from central Rochester, it takes about 15 minutes if you're travelling by car. This depends on traffic, however. It's approximately 11 kilometres from the airport to the city centre.

  • You can expect a trip time of around 35 minutes on public transport.

  • Get your travels off to a relaxed start by staying near ROC. Whether you've booked an early flight from Rochester Airport to Ontario International Airport or just don't like being rushed, these hotels are the answer:

Arriving at Ontario International Airport (ONT)

When to fly to Ontario International Airport (ONT)

  • The quietest month for a flight from Rochester Airport to Ontario International Airport is March, while July is the busiest. Choose the best time to visit Ontario based on whether you prefer a more relaxed vibe or a faster pace.

  • The warmest month in Ontario is August, with temperatures ranging between 16ºC (61ºF) and 36ºC (97ºF). Book your flights from Rochester Airport to Ontario International Airport in this month if this is the type of weather you enjoy.

  • If you like travelling in cooler conditions, look for a cheap ticket from ROC to ONT in February. Average temperatures are between 4ºC (39ºF) and 24ºC (75ºF) then.

Explore more of the United States

  • You've visited Ontario, now it's time to discover other corners of the United States. Journey around 56 kilometres west to Los Angeles to check off its leading sights. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, you'll have a full itinerary ahead.

  • Around 153 kilometres south of Ontario, San Diego is another essential stop in the United States. Start your sightseeing at San Diego Zoo, San Diego Balboa Park and USS Midway Museum.

Plan smart, explore more

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Plan the rest of your trip from Rochester to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.