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Cheap flights from Montreal to Portsmouth from C$ 449

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
2 Sep — 9 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Montreal to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to Portsmouth
Explore the most affordable flight options available from Montreal to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 August 2026.

Mon 7/96:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Wed 14/105:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 30/7C$ 960
Wed 19/89:30 a.m.
YUL
-
SOU
2 stops18h 15m
Delta
Sat 29/85:30 p.m.
SOU
-
YUL
1 stop28h 25m
Delta
Deal found 30/7C$ 997
Mon 7/96:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Tue 13/109:05 a.m.
SOU
-
YUL
2 stops43h 20m
Delta
Deal found 30/7C$ 1,000
Thu 10/912:48 p.m.
YUL
-
SOU
2 stops38h 57m
Delta
Sat 24/109:20 a.m.
SOU
-
YUL
1 stop12h 35m
Delta
Deal found 30/7C$ 1,001
Wed 19/89:30 a.m.
YUL
-
SOU
2 stops18h 15m
Delta
Fri 28/89:15 a.m.
SOU
-
YUL
2 stops28h 24m
Delta
Deal found 30/7C$ 1,030
Thu 10/95:10 p.m.
YUL
-
SOU
2 stops34h 35m
Delta
Tue 13/109:05 a.m.
SOU
-
YUL
2 stops36h 10m
Delta
Deal found 30/7C$ 1,033
Sun 9/86:50 p.m.
YUL
-
SOU
1 stop17h 45m
Delta
Sat 15/85:30 p.m.
SOU
-
YUL
1 stop28h 25m
Delta
Deal found 2/8C$ 1,074
Wed 19/89:30 a.m.
YUL
-
SOU
2 stops18h 15m
Delta
Sun 30/85:30 p.m.
SOU
-
YUL
1 stop28h 25m
Delta
Deal found 30/7C$ 1,106
Sun 6/96:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Mon 12/105:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 30/7C$ 1,110
Sun 9/86:50 p.m.
YUL
-
SOU
1 stop17h 45m
Delta
Fri 14/86:05 p.m.
SOU
-
YUL
2 stops43h 34m
Delta
Deal found 2/8C$ 1,113
Thu 17/96:00 a.m.
YUL
-
SOU
2 stops45h 45m
Delta
Mon 21/95:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 29/7C$ 1,147

Find flight deals from Montreal to Portsmouth

Keep the following information in mind while searching for Montreal to Portsmouth flight deals. Data was last updated 3 August 2026.

Round-trip from

C$ 960

One-way from

C$ 449

Popular in

December

Cheapest in

November

Average price

C$ 1,077
Delta
  • Delta
  • 7/9-13/10
  • 2 total stops
  • 29h 50m total
  • Montreal to Portsmouth
Search Deals
25/9
  • 25/9
  • 1 total stop
  • 14h 55m total
  • Montreal to Portsmouth
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to Portsmouth 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 629,999 searches. Data last updated 3 August 2026.
Use the filters below to find and compare flights from Montreal to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

9:30 a.m.-8:45 a.m.

2 stops18h 15m

Southampton Eastleigh

Sat 29/8

5:30 p.m.-4:55 p.m.

1 stop28h 25m

C$ 997

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Tue 8/9

6:50 p.m.-4:50 p.m.

1 stop17h 00m

Southampton Eastleigh

Tue 13/10

9:05 a.m.-11:25 p.m.

2 stops43h 20m

C$ 1,000

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sat 12/9

6:00 a.m.-8:35 a.m.

2 stops45h 35m

Southampton Eastleigh

Sat 24/10

9:20 a.m.-4:55 p.m.

1 stop12h 35m

C$ 1,001
Quickest round-trip

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 14/9

6:50 p.m.-4:50 p.m.

1 stop17h 00m

Southampton Eastleigh

Thu 24/9

9:05 a.m.-4:55 p.m.

1 stop12h 50m

C$ 1,106

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

9:30 a.m.-8:45 a.m.

2 stops18h 15m

Southampton Eastleigh

Sun 30/8

5:30 p.m.-4:55 p.m.

1 stop28h 25m

C$ 1,106

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

6:50 p.m.-4:50 p.m.

1 stop17h 00m

Southampton Eastleigh

Tue 13/10

9:05 a.m.-4:15 p.m.

2 stops36h 10m

C$ 1,150

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Fri 15/1

7:15 p.m.-5:00 p.m.

1 stop16h 45m

Southampton Eastleigh

Wed 20/1

8:40 a.m.-5:15 p.m.

1 stop13h 35m

C$ 1,189

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 17/9

6:50 p.m.-4:50 p.m.

1 stop17h 00m

Southampton Eastleigh

Mon 21/9

5:20 p.m.-4:55 p.m.

1 stop28h 35m

C$ 1,261
Cheapest one-way
Quickest one-way

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

11:00 p.m.-6:55 p.m.

1 stop14h 55m

C$ 449

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 18/11

8:15 p.m.-8:40 a.m.

3 stops31h 25m

C$ 545

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from Montreal to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Montreal with our price prediction graph.
Estimated round-trip 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 Montreal to Portsmouth

What is the cheapest time of day to fly from YMQ to P0R?

Find hourly flight availability from Montreal to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 August 2026.

When flying from Montreal to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Montreal to Portsmouth

Explore weekly flight availability from Montreal to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 August 2026.

The most flights from YMQ to P0R are scheduled on a Friday (18 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

Related info for your journey

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

  • How long is the flight from Montreal to Portsmouth?

    There are many flights that can get you from Montreal to Portsmouth in 17h. Fly via Delta to get the fastest option. There are 5177 km between Montreal and Portsmouth.

  • What are the most reliable airlines from Montreal to Portsmouth?

    No one likes to see their flight delayed. When booking a flight from Montreal to Portsmouth consider choosing Egyptair (65%), American Airlines (61%) or Aer Lingus (61%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Montreal to Portsmouth?

    On average you can expect to pay C$ 2,317 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 601 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 1,190.

  • Can I find deals for flights from Montreal to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Montreal to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Portsmouth?

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

  • Can I find deals for business class flights from Montreal to Portsmouth?

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 8 airlines flying from Montreal to Portsmouth

Discover the top 8 airlines that operate flights from Montreal to Portsmouth. 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 629,999 searches. Data last updated 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 563AverageC$ 833FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 677AverageC$ 996FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 718AverageC$ 920FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
British AirwaysCheapestC$ 769AverageC$ 1,053FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapestC$ 770AverageC$ 1,065FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 788AverageC$ 1,091FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapestC$ 790AverageC$ 986FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapestC$ 957AverageC$ 1,133FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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

How does Cheapflights help users find flights from Montreal to Portsmouth?

Deals for Montreal to Portsmouth flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Portsmouth?

Millions of users choose and trust Cheapflights to book the best flight deals from Montreal to Portsmouth for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Montreal to Portsmouth with no change fees?

Yes, we can. To see specific flights from Montreal to Portsmouth 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 Montreal to Portsmouth become cheaper?

Of course! You can now track prices for flights from Montreal to Portsmouth 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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