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Cheap flights from Montreal to Portsmouth from C$ 963

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
18 May — 25 May1
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 18 April 2026.

Sun 14/66:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Wed 17/65:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 15/4C$ 970
Sat 2/56:00 a.m.
YUL
-
SOU
2 stops45h 35m
Delta
Sun 17/59:15 a.m.
SOU
-
YUL
1 stop12h 40m
Delta
Deal found 14/4C$ 1,010
Sat 2/56:00 a.m.
YUL
-
SOU
2 stops45h 35m
Delta
Wed 20/55:20 p.m.
SOU
-
YUL
2 stops47h 27m
Delta
Deal found 14/4C$ 1,041
Wed 29/46:00 a.m.
YUL
-
SOU
2 stops21h 35m
Delta
Sun 10/59:15 a.m.
SOU
-
YUL
2 stops18h 58m
Delta
Deal found 17/4C$ 1,048
Tue 5/56:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Thu 21/59:05 a.m.
SOU
-
YUL
1 stop12h 50m
Delta
Deal found 14/4C$ 1,159
Sat 2/56:00 a.m.
YUL
-
SOU
2 stops45h 35m
Delta
Mon 18/55:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 14/4C$ 1,198
Sat 2/56:00 a.m.
YUL
-
SOU
2 stops45h 35m
Delta
Tue 19/55:20 p.m.
SOU
-
YUL
2 stops34h 53m
Delta
Deal found 14/4C$ 1,230
Sat 8/86:45 a.m.
YUL
-
SOU
2 stops31h 45m
Multiple Airlines
Fri 21/89:20 a.m.
SOU
-
YUL
2 stops20h 05m
Multiple Airlines
Deal found 14/4C$ 1,323

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 18 April 2026.

Round-trip from

C$ 970

One-way from

C$ 963

Popular in

December

Cheapest in

September

Average price

C$ 1,017
Delta
  • Delta
  • 14/6-17/6
  • 2 total stops
  • 45h 35m total
  • Montreal to Portsmouth
Search Deals
Delta
  • Delta
  • 6/5
  • 1 total stop
  • 17h 00m total
  • Montreal to Portsmouth
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 20 potential increase over avg. RT price).
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 April 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 18 April 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

Sun 14/6

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

1 stop17h 00m

Southampton Eastleigh

Wed 17/6

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

1 stop28h 35m

C$ 970

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 7/5

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

2 stops21h 35m

Southampton Eastleigh

Sat 16/5

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

1 stop28h 35m

C$ 1,010

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

5:05 p.m.-8:35 a.m.

2 stops34h 30m

Southampton Eastleigh

Wed 20/5

5:20 p.m.-11:47 a.m.

2 stops47h 27m

C$ 1,041

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

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

2 stops45h 35m

Southampton Eastleigh

Mon 18/5

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

1 stop28h 35m

C$ 1,198
Quickest round-trip

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

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

2 stops21h 35m

Southampton Eastleigh

Sun 10/5

9:15 a.m.-4:55 p.m.

1 stop12h 40m

C$ 1,356

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Fri 17/7

6:50 p.m.-5:00 p.m.

1 stop17h 10m

Southampton Eastleigh

Sat 1/8

5:30 p.m.-11:25 p.m.

2 stops34h 55m

C$ 1,647

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

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

1 stop17h 00m

Southampton Eastleigh

Sun 10/5

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

1 stop28h 35m

C$ 1,658

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 20/7

6:00 a.m.-8:45 a.m.

2 stops21h 45m

Southampton Eastleigh

Sat 1/8

5:30 p.m.-4:24 p.m.

2 stops27h 54m

C$ 1,724

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

6:50 p.m.-5:35 p.m.

1 stop17h 45m

Southampton Eastleigh

Sun 2/8

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

1 stop28h 25m

C$ 1,758
Cheapest one-way

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 6/5

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

1 stop17h 00m

C$ 963

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 14 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 18 April 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 18 April 2026.

The most flights from YMQ to P0R are scheduled on a Wednesday (18 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 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 Thai Airways (85%), American Airlines (83%) or Aer Lingus (83%) 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$ 1,737 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 828 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 977.

  • 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 18 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 649AverageC$ 962FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 674AverageC$ 731FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 724AverageC$ 916FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
British AirwaysCheapestC$ 732AverageC$ 1,026FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapestC$ 746AverageC$ 1,033FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 750AverageC$ 1,035FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapestC$ 770AverageC$ 977FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapestC$ 933AverageC$ 1,122FlexibilityNo 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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