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661 € Cheap Flights from Glasgow Intl to Ontario International

Compare Glasgow Intl 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 Glasgow Intl to Ontario International

Looking for a cheap last-minute deal or the best return flight from Glasgow Intl Airport to Ontario International Airport? If you want to travel next month, return fares start from 800 €. Find the lowest prices on one-way and return tickets right here.
Ontario.661 € per passenger.Departing Thu, 3 Sep, returning Tue, 15 Sep.Return flight with Ryanair and Frontier Airlines.Outbound indirect flight with Ryanair, departs from Glasgow Intl on Thu, 3 Sep, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Tue, 15 Sep, arriving in Glasgow Intl.Price includes taxes and charges.From 661 €, select.
Ontario.711 € per passenger.Departing Mon, 31 Aug, returning Mon, 7 Sep.Return flight with Ryanair and Frontier Airlines.Outbound indirect flight with Ryanair, departs from Glasgow Intl on Mon, 31 Aug, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 7 Sep, arriving in Glasgow Intl.Price includes taxes and charges.From 711 €, select.
Ontario.718 € per passenger.Departing Thu, 12 Nov, returning Tue, 17 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Thu, 12 Nov, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 17 Nov, arriving in Glasgow Intl.Price includes taxes and charges.From 718 €, select.
Ontario.719 € per passenger.Departing Wed, 2 Dec, returning Tue, 15 Dec.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Wed, 2 Dec, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 15 Dec, arriving in Glasgow Intl.Price includes taxes and charges.From 719 €, select.
Ontario.720 € per passenger.Departing Tue, 24 Nov, returning Fri, 4 Dec.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Tue, 24 Nov, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Fri, 4 Dec, arriving in Glasgow Intl.Price includes taxes and charges.From 720 €, select.
Ontario.720 € per passenger.Departing Thu, 29 Oct, returning Tue, 3 Nov.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Thu, 29 Oct, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 3 Nov, arriving in Glasgow Intl.Price includes taxes and charges.From 720 €, select.
Ontario.725 € per passenger.Departing Thu, 8 Oct, returning Sat, 17 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Glasgow Intl on Thu, 8 Oct, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sat, 17 Oct, arriving in Glasgow Intl.Price includes taxes and charges.From 725 €, select.
Ontario.728 € per passenger.Departing Tue, 23 Feb, returning Tue, 2 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Tue, 23 Feb, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 2 Mar, arriving in Glasgow Intl.Price includes taxes and charges.From 728 €, select.
Ontario.728 € per passenger.Departing Tue, 2 Mar, returning Tue, 9 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Tue, 2 Mar, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 9 Mar, arriving in Glasgow Intl.Price includes taxes and charges.From 728 €, select.
Ontario.750 € per passenger.Departing Tue, 18 May, returning Fri, 28 May.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Tue, 18 May, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Fri, 28 May, arriving in Glasgow Intl.Price includes taxes and charges.From 750 €, select.
Ontario.769 € per passenger.Departing Mon, 5 Apr, returning Thu, 15 Apr.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Mon, 5 Apr, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Thu, 15 Apr, arriving in Glasgow Intl.Price includes taxes and charges.From 769 €, select.
Ontario.800 € per passenger.Departing Tue, 18 Aug, returning Mon, 31 Aug.Return flight with Air Transat and Frontier Airlines.Outbound indirect flight with Air Transat, departs from Glasgow Intl on Tue, 18 Aug, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 31 Aug, arriving in Glasgow Intl.Price includes taxes and charges.From 800 €, select.
Ontario.843 € per passenger.Departing Tue, 22 Dec, returning Tue, 5 Jan.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Glasgow Intl on Tue, 22 Dec, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 5 Jan, arriving in Glasgow Intl.Price includes taxes and charges.From 843 €, select.

Find the cheapest month to fly from Glasgow Intl to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Glasgow Intl to Ontario International flights are currently cheapest in September.
Jul
Find prices
Aug
from 800 €
Sep
from 661 €
Oct
from 725 €
Nov
from 718 €
Dec
from 719 €
Jan
Find prices
Feb
Find prices
Mar
from 728 €
Apr
from 769 €
May
from 750 €
Jun
Find prices

Glasgow Intl to Ontario International: Alternative routes

Compare routes from Glasgow Intl 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 661 €
Search flights

San Bernardino Norton AFB

39km from central Ontario
from 969 €
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Santa Ana John Wayne

48km from central Ontario
from 725 €
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Long Beach Municipal

54km from central Ontario
from 779 €
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Hawthorne

65km from central Ontario
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Burbank

67km from central Ontario
from 683 €
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Los Angeles International

71km from central Ontario
Cheapest
from 614 €
Search flights

Glasgow to Ontario: Flight information

The things to know before you go.
Cheapest flight found661 €
Cheapest month to flySeptember

Finding cheap flights from Glasgow Intl to Ontario International: Frequently asked questions

The best price we found for a return flight from Glasgow Intl to Ontario International is 661 €. 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 Glasgow Intl to Ontario International. But we found flights with one or more stops from 661 €.
As of July 2026, there are no flights flying from Glasgow Intl to Ontario International.
The cheapest month to fly from Glasgow Intl to Ontario International is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Glasgow Intl Airport to Ontario International Airport on Thursday, 3 September 2026.
No airlines currently offer direct flights between Glasgow Intl 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, Ryanair offers the cheapest flight tickets to Ontario International.

Flying from Glasgow International Airport (GLA) to Ontario International Airport (ONT): what you need to know

  • Ontario is seven hours behind Glasgow and is in the UTC-7 timezone.

  • Your GLA to ONT flight won't wait if you're late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • You'll likely experience bigger queues during popular months like June. Arriving up to four hours in advance for an international flight and two hours for a domestic departure is a smart move.

How to find the cheapest flights from Glasgow International Airport (GLA) to Ontario International Airport (ONT)

  • 444 € is currently the best price for a one-way Glasgow International Airport to Ontario International Airport flight. A return flight starts at 661 €. These fares can change depending on demand.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from GLA to ONT if you book in advance. Airlines often offer some fantastic early bird rates.

  • The 'Whole month' tool shows you the cheapest flights from Glasgow International Airport to Ontario International Airport throughout the month. It's a great way to find a bargain if your trip dates are flexible.

  • Landing cheap flights from GLA to ONT is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch as soon as fares go down.

  • Secure the ideal flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Glasgow International Airport to Ontario International Airport, use the 'Sort by' function. You can also filter results by airline, departure and arrival times, and journey duration.

Handy information about Glasgow International Airport (GLA)

  • When it comes to the on-time performance of Glasgow International Airport, 70.07% of flights arrive within the expected timeframe.

  • To get to Glasgow International Airport from central Glasgow, it takes about 15 minutes by car. This depends on traffic, however. It's approximately 14 kilometres from the airport to the city centre.

  • Planning to catch public transport? Expect a journey time of around 35 minutes.

  • Catching an early flight from Glasgow International Airport to Ontario International Airport? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these hotels near GLA:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • The address for ONT is 2900 E. Airport Drive.

  • Ontario International Airport to central Ontario has a drive time of about 10 minutes. It's approximately 6 kilometres away.

  • Getting there by public transport takes roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • It's time to choose your trip dates for your flight from Glasgow International Airport to Ontario International Airport. August is the busiest month to head to Ontario. If you're after a more low-key vibe, go in May.

  • Before locking in your flight from Glasgow International Airport to Ontario International Airport, think about the kind of weather you enjoy. August is the warmest month in Ontario, with temperatures ranging from 15ºC (59ºF) to 35ºC (95ºF).

  • For cooler conditions, look for a cheap ticket from GLA to ONT in January. Average temperatures are between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • Los Angeles is just one of the many cities in United States waiting to be discovered once you've seen the sights of Ontario. Around 56 kilometres away to the west, top sights here include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • If you're eager to discover another major stop in United States, consider San Diego, about 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are highlights.

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