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Cheap flights from Portsmouth to Niagara Falls, Ontario from £234

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
18 Mar — 25 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Niagara Falls

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Niagara Falls
Explore the most affordable flight options available from Portsmouth to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 February 2026.

Wed 1/409:10
SOU
-
YYZ
2 stops35h 30m
Multiple Airlines
Wed 8/417:10
YYZ
-
SOU
2 stops21h 20m
Multiple Airlines
Deal found 15/2£592
Wed 1/409:10
SOU
-
YYZ
1 stop11h 40m
Aer Lingus
Wed 8/417:35
YYZ
-
SOU
1 stop18h 00m
Aer Lingus
Deal found 15/2£606
Tue 5/517:20
SOU
-
YYZ
1 stop31h 35m
Delta
Wed 20/516:45
YYZ
-
SOU
1 stop10h 50m
Delta
Deal found 12/2£620
Mon 30/317:20
SOU
-
YYZ
2 stops44h 02m
KLM
Mon 6/416:45
YYZ
-
SOU
1 stop10h 50m
KLM
Deal found 12/2£636
Sun 3/517:20
SOU
-
YYZ
2 stops34h 47m
Delta
Wed 20/516:45
YYZ
-
SOU
1 stop10h 50m
Delta
Deal found 12/2£641
Tue 5/517:20
SOU
-
YYZ
1 stop25h 00m
Delta
Sat 16/521:55
YYZ
-
SOU
1 stop13h 55m
Delta
Deal found 12/2£650
Thu 23/409:10
SOU
-
YYZ
1 stop11h 40m
British Airways
Mon 27/417:35
YYZ
-
SOU
1 stop10h 05m
British Airways
Deal found 12/2£662
Wed 3/609:05
SOU
-
YYZ
1 stop15h 50m
Delta
Tue 8/912:10
YYZ
-
SOU
2 stops23h 40m
Delta
Deal found 12/2£666
Thu 7/517:20
SOU
-
YYZ
2 stops29h 19m
Delta
Tue 19/516:45
YYZ
-
SOU
1 stop10h 50m
Delta
Deal found 12/2£671
Mon 6/409:10
SOU
-
YYZ
1 stop11h 40m
British Airways
Thu 16/417:35
YYZ
-
SOU
1 stop10h 05m
British Airways
Deal found 15/2£679

Find flight deals from Portsmouth to Niagara Falls

Keep the following information in mind while searching for Portsmouth to Niagara Falls flight deals. Data was last updated 16 February 2026.

Round-trip from

£592

One-way from

£234

Popular in

December

Cheapest in

September

Average price

£367
1/4-8/4
  • 1/4-8/4
  • 4 total stops
  • 56h 50m total
  • Portsmouth to Niagara Falls
Search Deals
9/5
  • 9/5
  • 2 total stops
  • 34h 30m total
  • Portsmouth to Niagara Falls
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Niagara Falls 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 16 February 2026.
Use the filters below to find and compare flights from Portsmouth to Niagara Falls that are best for you.

Fly from

Portsmouth

Fly to

Niagara Falls

Route

Depart

Return

Price

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Tue 5/5

17:20-19:55

1 stop31h 35m

Toronto Pearson Intl

Tue 19/5

16:45-08:35

1 stop10h 50m

£620

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Wed 6/5

09:05-19:55

1 stop15h 50m

Toronto Pearson Intl

Wed 20/5

16:45-08:35

1 stop10h 50m

£620

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Wed 6/5

09:05-19:55

1 stop15h 50m

Toronto Pearson Intl

Tue 19/5

16:45-08:35

1 stop10h 50m

£620

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Wed 6/5

09:05-19:55

1 stop15h 50m

Toronto Pearson Intl

Mon 18/5

21:55-08:35

1 stop29h 40m

£620

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Wed 6/5

09:05-19:55

1 stop15h 50m

Toronto Pearson Intl

Thu 21/5

16:45-08:35

1 stop10h 50m

£620

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Mon 4/5

09:05-23:07

2 stops19h 02m

Toronto Pearson Intl

Thu 21/5

16:45-08:35

1 stop10h 50m

£641

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Sun 3/5

17:20-23:07

2 stops34h 47m

Toronto Pearson Intl

Wed 20/5

16:45-08:35

1 stop10h 50m

£641

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Tue 5/5

09:05-23:07

2 stops19h 02m

Toronto Pearson Intl

Thu 21/5

16:45-08:35

1 stop10h 50m

£641

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Tue 5/5

09:05-23:07

2 stops19h 02m

Toronto Pearson Intl

Mon 18/5

21:55-08:35

1 stop29h 40m

£641

SouthamptonToronto

SOU - YYZ

SOUYYZ

Southampton Eastleigh

Tue 5/5

17:20-13:20

1 stop25h 00m

Toronto Pearson Intl

Sat 16/5

21:55-16:50

1 stop13h 55m

£650

Flights are sorted by cheapest return flights first.

Deals found on 15/2

Showing 1-10 of 17 results
1
2

Best time to book a flight from Portsmouth to Niagara Falls

Have a flexible travel schedule? Discover the best time to fly to Niagara Falls from Portsmouth 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 Portsmouth to Niagara Falls

What is the cheapest month to book a flight from Portsmouth to Niagara Falls?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Niagara Falls (average of £209). Flying from Portsmouth to Niagara Falls in December is currently the most expensive (average of £361). 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 P0R to NI4?

Find hourly flight availability from Portsmouth to Niagara Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 February 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Niagara Falls as you normally would.

Weekly flight availability from Portsmouth to Niagara Falls

Explore weekly flight availability from Portsmouth to Niagara Falls. 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 February 2026.

The most flights from P0R to NI4 are scheduled on a Sunday (35 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (25 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Niagara Falls. 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 Portsmouth to Niagara Falls?

    Delta can get you from Portsmouth to Niagara Falls in just under 31h 35m. Your travel time can differ by up to . Portsmouth and Niagara Falls are separated by a distance of 3523 mi.

  • What are the most reliable airlines from Portsmouth to Niagara Falls?

    No one likes to see their flight delayed. When booking a flight from Portsmouth to Niagara Falls consider choosing KLM (91%), Air France (91%) or Delta (91%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portsmouth to Niagara Falls?

    On average you can expect to pay £1,100 for a flight from Portsmouth to Niagara Falls. The cheapest flight overall is £274 while the most popular route, (Southampton Eastleigh - Toronto Pearson Intl) is currently priced at £592.

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

    Yes. In addition to deals on Portsmouth to Niagara Falls flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Niagara Falls?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Niagara Falls 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 Portsmouth to Niagara Falls?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Niagara Falls (average of £209). Flying from Portsmouth to Niagara Falls in December is currently the most expensive (average of £361). 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 Portsmouth to Niagara Falls

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Pearson Intl flights
Gatwick to Pearson Intl flights
Heathrow to Toronto Island flights
London City to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Stansted to Pearson Intl flights
Luton to Pearson Intl flights
Gatwick to Toronto Island flights
Manchester to Pearson Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Edinburgh to Pearson Intl flights
Manchester to Toronto Island flights
Heathrow to Ottawa flights
Southend to Pearson Intl flights
Edinburgh to Toronto Island flights
Birmingham to Pearson Intl flights
Manchester to Pierre Elliott Trudeau Intl flights
Gatwick to Ottawa flights
Newcastle upon Tyne to Pearson Intl flights
London City to Ottawa flights
Southampton to Pearson Intl flights
Leeds to Pearson Intl flights
Edinburgh to Pierre Elliott Trudeau Intl flights
Birmingham to Toronto Island flights
Stansted to Ottawa flights
Heathrow to Thunder Bay flights
Heathrow to London flights
Manchester to Ottawa flights
Newcastle upon Tyne to Pierre Elliott Trudeau Intl flights
Birmingham to Ottawa flights
Liverpool to Pearson Intl flights
Birmingham to Pierre Elliott Trudeau Intl flights
Bristol to Pearson Intl flights
Leeds to Pierre Elliott Trudeau Intl flights
Gatwick to Thunder Bay flights
Heathrow to Windsor flights
Exeter to Pearson Intl flights
Gatwick to London flights
East Midlands to Pearson Intl flights
Newcastle upon Tyne to Toronto Island flights
Bristol to Toronto Island flights

Top 10 airlines flying from Portsmouth to Niagara Falls

Discover the top 10 airlines that operate flights from Portsmouth to Niagara Falls. 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 16 February 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£267Average£337FlexibilityNo cancel feeOn-time79%
Search SWISS flights
TAP AIR PORTUGALCheapest£274Average£517FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£280Average£418FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£289Average£397FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
DeltaCheapest£301Average£496FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapest£303Average£401FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£309Average£494FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapest£314Average£482FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£317Average£456FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£329Average£432FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Portsmouth to Niagara Falls?

Deals for Portsmouth to Niagara Falls 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 Portsmouth to Niagara Falls?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Niagara Falls from Portsmouth.

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

Need flexible booking options for your flight to Niagara Falls from Portsmouth? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to Niagara Falls become cheaper?

Yes, Cheapflights offers price alerts on Portsmouth to Niagara Falls flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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