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Cheap flights from Glasgow Intl Airport to Ontario from £452

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
GLA — ONT
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Glasgow Intl to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Glasgow Intl (GLA) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 October 2025.

Round-trip from

£597

One-way from

£452

Popular in

August

Cheapest in

March

Average price

£588
Delta
  • Delta
  • 12/1-27/1
  • 4 total stops
  • 57h 07m total
  • Glasgow to Ontario
Search Deals
5/11
  • 5/11
  • 3 total stops
  • 35h 56m total
  • Glasgow to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Glasgow Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Glasgow Intl to Ontario
Explore the most affordable flight options available from Glasgow Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2025.

Mon 3/1112:35GLA - ONT
2 stops19h 21mMultiple Airlines
Sat 8/1116:11ONT - GLA
2 stops33h 44mMultiple Airlines
Deal found 28/10£1,086

Cheapflights Fare Finder

 
Customise your flight search to find flights from Glasgow Intl to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 October 2025.
Use the filters below to find and compare flights from Glasgow Intl Airport to Ontario that are best for you.

Fly from

Glasgow Intl

Fly to

Ontario

Route

Depart

Return

Price

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 12/1

06:05-21:07

2 stops23h 02m

Ontario

Sun 25/1

22:30-16:35

2 stops34h 05m

£597

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 12/1

06:05-21:07

2 stops23h 02m

Ontario

Wed 28/1

06:00-16:35

2 stops26h 35m

£597

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Mon 12/1

06:05-21:07

2 stops23h 02m

Ontario

Tue 27/1

22:30-16:35

2 stops34h 05m

£597

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Thu 26/3

08:40-22:02

2 stops20h 22m

Ontario

Mon 30/3

17:02-18:30

2 stops17h 28m

£864

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Sun 11/1

09:20-20:15

2 stops18h 55m

Ontario

Sun 11/1

23:59-09:50

2 stops25h 51m

£3,275

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Wed 5/11

08:55-12:51

3 stops35h 56m

£452

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Wed 24/12

08:40-20:58

2 stops20h 18m

£457

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Thu 25/12

06:35-18:18

2 stops19h 43m

£499

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Fri 26/12

06:35-20:58

2 stops22h 23m

£520

GlasgowOntario

GLA - ONT

GLAONT

Glasgow Intl

Sat 8/11

18:50-21:59

2 stops35h 09m

£629

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Showing 1-10 of 16 results
1
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Best time to book a flight from Glasgow Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Glasgow Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Glasgow Intl Airport to Ontario

What is the cheapest month to book a flight from Glasgow Intl Airport to Ontario?

Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Ontario (average of £361). Flying from Glasgow Intl Airport to Ontario in August is currently the most expensive (average of £541). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 30 October 2025.
See what other customers who have flown with British Airways from Glasgow Intl Airport to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,485 reviews
Check prices

Comfort

6.7

Crew

7.6

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.3

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,485 reviews
British Airways
6.7
Okay
7,485 reviews
Check prices

Comfort

6.7

Crew

7.6

Entertainment

6.4

Boarding

6.9

Overall

6.7

Food

6.3

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

Find useful and relevant information for your journey from Glasgow Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Glasgow Intl?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Glasgow Intl. On average, Ontario has 0 inbound flights from Glasgow Intl per day from 1 airline. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Glasgow Intl Airport to Ontario?

    Departing from Glasgow Intl Airport to Ontario will take you 20h 22m. There are 5088 mi between Glasgow Intl Airport and Ontario. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from Glasgow Intl Airport to Ontario round-trip?

    According to our current data, British Airways (£443), offers the cheapest pricing from Glasgow Intl Airport to Ontario.

  • Can I find deals for flights from Glasgow Intl to Ontario that include hotel bookings?

    Yes. In addition to deals on Glasgow Intl to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Glasgow Intl to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Glasgow Intl to Ontario.

  • Can I find deals for business class flights from Glasgow Intl to Ontario?

    Yes. Cheapflights offers flight deals from Glasgow Intl to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Glasgow Intl Airport to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Glasgow Intl Airport to Ontario (average of £361). Flying from Glasgow Intl Airport to Ontario in August is currently the most expensive (average of £541). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Glasgow Intl to Ontario

Discover the top airline that operate flights from Glasgow Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£443Average£489FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Glasgow Intl to Ontario?

Cheapflights helps you search for flights from Glasgow Intl to Ontario via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Glasgow Intl to Ontario?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Glasgow Intl to Ontario for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Glasgow Intl to Ontario with no change fees?

Yes, we can. To see specific flights from Glasgow Intl to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Glasgow Intl to Ontario become cheaper?

Of course! You can now track prices for flights from Glasgow Intl to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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