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Cheap flights from Montreal to Portsmouth from C$ 939

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Montreal to Portsmouth

Keep the following information in mind while searching for Montreal to Portsmouth flight deals. Data was last updated 16 September 2025.

Round-trip from

C$ 939

Popular in

December

Cheapest in

May

Average price

C$ 902
Delta
  • Delta
  • 30/9-4/12
  • 2 total stops
  • 45h 25m total
  • Montreal to Portsmouth
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Montreal to Portsmouth

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 16 September 2025.

Tue 30/96:50 p.m.YUL - SOU
1 stop17h 10mDelta
Thu 4/126:05 p.m.SOU - YUL
1 stop28h 15mDelta
Deal found 14/9C$ 939
Wed 5/117:10 p.m.YUL - SOU
1 stop31h 55mDelta
Sun 9/116:05 p.m.SOU - YUL
1 stop28h 15mDelta
Deal found 16/9C$ 941
Tue 30/96:00 a.m.YUL - SOU
2 stops30h 00mDelta
Tue 2/125:30 p.m.SOU - YUL
1 stop28h 50mDelta
Deal found 14/9C$ 978
Wed 5/117:10 p.m.YUL - SOU
1 stop31h 55mDelta
Thu 13/116:05 p.m.SOU - YUL
2 stops43h 31mDelta
Deal found 16/9C$ 979
Tue 30/96:00 a.m.YUL - SOU
2 stops30h 00mDelta
Fri 28/118:40 a.m.SOU - YUL
2 stops32h 19mDelta
Deal found 14/9C$ 1,010
Sun 2/115:00 a.m.YUL - SOU
2 stops45h 10mDelta
Sun 9/119:30 a.m.SOU - YUL
2 stops28h 06mDelta
Deal found 16/9C$ 1,013
Wed 1/106:50 p.m.YUL - SOU
1 stop17h 10mDelta
Wed 3/128:40 a.m.SOU - YUL
2 stops19h 52mDelta
Deal found 14/9C$ 1,037
Thu 6/117:05 p.m.YUL - SOU
2 stops16h 55mKLM
Sun 16/116:05 p.m.SOU - YUL
1 stop28h 15mKLM
Deal found 15/9C$ 1,049
Tue 30/96:00 a.m.YUL - SOU
2 stops30h 00mDelta
Wed 3/128:40 a.m.SOU - YUL
2 stops19h 52mDelta
Deal found 14/9C$ 1,071
Thu 6/112:00 p.m.YUL - SOU
3 stops20h 50mMultiple Airlines
Sun 16/118:10 p.m.SOU - YUL
2 stops24h 13mMultiple Airlines
Deal found 15/9C$ 1,173
Mon 29/96:00 a.m.YUL - SOU
2 stops21h 45mDelta
Mon 1/128:40 a.m.SOU - YUL
1 stop13h 40mDelta
Deal found 14/9C$ 1,216
Sun 28/96:50 p.m.YUL - SOU
1 stop17h 10mDelta
Fri 28/118:40 a.m.SOU - YUL
1 stop13h 40mDelta
Deal found 14/9C$ 1,227

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 16 September 2025.
Use the filters below to find and compare flights from Montreal to Portsmouth that are best for you.

Fly from

Montreal

Fly to

Portsmouth

Route

Depart

Return

Price

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

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

1 stop17h 10m

Southampton Eastleigh

Tue 2/12

5:30 p.m.-5:20 p.m.

1 stop28h 50m

C$ 939

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

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

1 stop17h 10m

Southampton Eastleigh

Thu 4/12

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 939

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

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

1 stop17h 10m

Southampton Eastleigh

Thu 4/12

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 939

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

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

1 stop17h 10m

Southampton Eastleigh

Tue 2/12

5:30 p.m.-5:20 p.m.

1 stop28h 50m

C$ 939

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

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

1 stop17h 10m

Southampton Eastleigh

Wed 3/12

8:40 a.m.-5:20 p.m.

1 stop13h 40m

C$ 939

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 6/11

2:00 p.m.-7:40 p.m.

2 stops24h 40m

Southampton Eastleigh

Sun 16/11

8:10 p.m.-3:23 p.m.

2 stops24h 13m

C$ 941

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

Sun 9/11

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 941

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

Mon 10/11

8:40 a.m.-5:20 p.m.

1 stop13h 40m

C$ 941

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 5/11

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

Thu 13/11

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 941

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

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

2 stops45h 45m

Southampton Eastleigh

Thu 4/12

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 978

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Showing 1-10 of 13 results
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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 month to book a flight from Montreal to Portsmouth?

Currently, January is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 560). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 856). 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.

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 16 September 2025.

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.

What is the cheapest day to fly from Montreal to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Montreal to Portsmouth. Price data was last updated on 15 September 2024.

Travelers seeking maximum savings on their Montreal to Portsmouth flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 16 September 2025.

The most flights from YMQ to P0R are scheduled on a Tuesday (18 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (8 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 10m. 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 American Airlines (70%), Aer Lingus (70%) or Finnair (70%) 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$ 1,972 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 399 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 941.

  • 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.

  • What is the cheapest month to book a flight from Montreal to Portsmouth?

    Currently, January is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 560). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 856). 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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Alternative routes for Montreal to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Montreal to Portsmouth

Discover the top 10 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 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 603AverageC$ 695FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air FranceCheapestC$ 609AverageC$ 959FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapestC$ 633AverageC$ 975FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 718AverageC$ 890FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
LufthansaCheapestC$ 759AverageC$ 999FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapestC$ 760AverageC$ 1,004FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapestC$ 769AverageC$ 877FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapestC$ 772AverageC$ 1,022FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapestC$ 791AverageC$ 1,098FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapestC$ 803AverageC$ 1,183FlexibilityNo cancel feeOn-time75%
Search KLM 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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