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Cheap Flights from Bristol (BRS) to Ontario International (ONT)

Compare Bristol 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 Bristol to Ontario International

Looking for a cheap last-minute deal or the best return flight from Bristol to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.£609 per passenger.Departing Wed, 18 Mar, returning Wed, 25 Mar.Return flight with KLM.Outbound indirect flight with KLM, departs from Bristol on Wed, 18 Mar, arriving in Ontario International.Inbound indirect flight with KLM, departs from Ontario International on Wed, 25 Mar, arriving in Bristol.Price includes taxes and charges.From £609, select.
Ontario.£619 per passenger.Departing Tue, 14 Apr, returning Tue, 21 Apr.Return flight with KLM.Outbound indirect flight with KLM, departs from Bristol on Tue, 14 Apr, arriving in Ontario International.Inbound indirect flight with KLM, departs from Ontario International on Tue, 21 Apr, arriving in Bristol.Price includes taxes and charges.From £619, select.
Ontario.£640 per passenger.Departing Thu, 1 Oct, returning Thu, 8 Oct.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Bristol on Thu, 1 Oct, arriving in Ontario International.Inbound indirect flight with Virgin Atlantic, departs from Ontario International on Thu, 8 Oct, arriving in Bristol.Price includes taxes and charges.From £640, select.
Ontario.£671 per passenger.Departing Thu, 16 Apr, returning Fri, 8 May.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Bristol on Thu, 16 Apr, arriving in Ontario International.Inbound indirect flight with Virgin Atlantic, departs from Ontario International on Fri, 8 May, arriving in Bristol.Price includes taxes and charges.From £671, select.
Ontario.£723 per passenger.Departing Mon, 14 Sep, returning Mon, 21 Sep.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Bristol on Mon, 14 Sep, arriving in Ontario International.Inbound indirect flight with Virgin Atlantic, departs from Ontario International on Mon, 21 Sep, arriving in Bristol.Price includes taxes and charges.From £723, select.
Ontario.£853 per passenger.Departing Fri, 1 May, returning Fri, 8 May.Return flight with KLM.Outbound indirect flight with KLM, departs from Bristol on Fri, 1 May, arriving in Ontario International.Inbound indirect flight with KLM, departs from Ontario International on Fri, 8 May, arriving in Bristol.Price includes taxes and charges.From £853, select.
Ontario.£901 per passenger.Departing Tue, 1 Sep, returning Sat, 31 Oct.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Bristol on Tue, 1 Sep, arriving in Ontario International.Inbound indirect flight with Virgin Atlantic, departs from Ontario International on Sat, 31 Oct, arriving in Bristol.Price includes taxes and charges.From £901, select.
Ontario.£925 per passenger.Departing Wed, 28 Oct, returning Sun, 1 Nov.Return flight with KLM.Outbound indirect flight with KLM, departs from Bristol on Wed, 28 Oct, arriving in Ontario International.Inbound indirect flight with KLM, departs from Ontario International on Sun, 1 Nov, arriving in Bristol.Price includes taxes and charges.From £925, select.

Find the cheapest month to fly from Bristol to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Bristol to Ontario International flights are currently cheapest in March.
Mar
from £609
Apr
from £619
May
from £853
Jun
from £1,057
Jul
from £1,065
Aug
from £1,119
Sep
from £723
Oct
from £640
Nov
Find prices
Dec
Find prices
Jan
Find prices
Feb
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Bristol to Ontario International: Alternative routes

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

Ontario International

2 miles from central Ontario
Closest
from £609
Search flights

San Bernardino Norton AFB

24 miles from central Ontario
Search flights

Santa Ana John Wayne

30 miles from central Ontario
from £525
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Long Beach Municipal

33 miles from central Ontario
from £732
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Hawthorne

40 miles from central Ontario
Search flights

Burbank

42 miles from central Ontario
Search flights

Los Angeles International

44 miles from central Ontario
Cheapest
from £450
Search flights

Bristol to Ontario: Flight information

The things to know before you go.
Cheapest flight found£609
Cheapest month to flyMarch

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

The best price we found for a return flight from Bristol to Ontario International is £609. 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 Bristol to Ontario International. But we found flights with one or more stops from £609.
As of March 2026, there are no flights flying from Bristol to Ontario International.
The cheapest month to fly from Bristol to Ontario International is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Bristol Airport to Ontario International Airport on Wednesday, 18 March 2026.
No airlines currently offer direct flights between Bristol 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, KLM offers the cheapest flight tickets to Ontario International.

Flying from Bristol Airport (BRS) to Ontario International Airport (ONT): what you need to know

  • The timezone in Ontario is UTC-7, which is seven hours behind Bristol.

  • Get to the airport on time so you don't miss your BRS to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.

  • During popular months like August, it's best to get to the airport earlier. Plan to arrive two hours before a domestic departure and four hours ahead for an international flight when you travel during a peak period in general.

How to find the cheapest flights from Bristol Airport (BRS) to Ontario International Airport (ONT)

  • £502 is currently the best price for a one-way Bristol Airport to Ontario International Airport flight. A return flight starts from £609. These prices can change based on demand and availability.

  • To find cheap tickets from BRS to ONT, book ahead. Airlines generally offer their best fares when flights are first released.

  • If you're willing to be flexible with your trip dates, use the 'Whole month' tool. It'll give you the cheapest price in each month when looking for a flight from Bristol Airport to Ontario International Airport.

  • You won't have to check back in every day to find out if fares have gone down when you create a Price Alert. We'll notify you as soon as a special offer becomes available on cheap flights from BRS to ONT.

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

Handy information about Bristol Airport (BRS)

  • Of the departures from Bristol Airport, 69.8% land on schedule at their destination.

  • To reach Bristol Airport from central Bristol, it'll take about 25 minutes by car. This depends on traffic though. It's approximately 10 miles from the airport to the city centre.

  • You can expect a journey time of around 1 hour 15 minutes when using public transport.

  • Booked an early flight from Bristol Airport to Ontario International Airport? Avoid the hassle of rushing to the airport (and sneak in some extra precious sleep) by picking one of these stays near BRS:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • Ontario International Airport to central Ontario has a drive time of around 10 minutes. It's approximately 4 miles away.

  • Travelling on public transport will take you roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • The quietest month for a flight from Bristol Airport to Ontario International Airport is May, while August is the busiest. Choose the best time to go to Ontario based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • Lock in your flight from Bristol Airport to Ontario International Airport for August if you'd like to visit Ontario during its warmest month. You can expect temperatures of between 15ºC (59ºF) and 35ºC (95ºF).

  • If you like cooler conditions, look for a cheap ticket from BRS to ONT in January. Temperatures average between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be discovered after you've experienced Ontario. Around 35 miles away to the west, top sights here include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 95 miles south of Ontario, San Diego is another favourite stop in United States. Experience the best of this destination with a visit to San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

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