Cheap flights from Stewart International to London Heathrow

Compare Stewart International to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from Stewart International to London Heathrow

Looking for a cheap last-minute deal or the best round-trip flight from Stewart International to London Heathrow? Find the lowest prices on one-way and round-trip tickets right here.

London.C$1,393 per passenger.Departing Thu, Oct 16, returning Thu, Oct 23.Round-trip flight with Allegiant Air and TAP Air Portugal.Outbound indirect flight with Allegiant Air, departing from Stewart International on Thu, Oct 16, arriving in London Heathrow.Inbound indirect flight with TAP Air Portugal, departing from London Heathrow on Thu, Oct 23, arriving in Stewart International.Price includes taxes and charges.From C$1,393, select.

Find the cheapest month to fly from Stewart International to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Stewart International to London Heathrow flights are currently cheapest in October.

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Stewart International to London Heathrow: Alternative routes

Compare routes from Stewart International to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

New York to London: Flight information

The things to know before you go.

Cheapest flight found	C$1,393
Cheapest month to fly	October

Finding cheap flights from Stewart International to London Heathrow: Frequently asked questions

How much are round-trip flights from Stewart International to London Heathrow?

The best price we found for a round-trip flight from Stewart International to London Heathrow is C$1,393. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Stewart International to London Heathrow?

Currently, there are no airlines that fly direct from Stewart International to London Heathrow. But we found flights with one or more stops from C$1,393.

How many flights are there a week from Stewart International to London Heathrow?

There are no flights flying from Stewart International to London Heathrow, as of September 2025.

When is the cheapest time to fly from Stewart International to London Heathrow?

The cheapest month to fly from Stewart International to London Heathrow is usually October.

Which upcoming date is cheapest to fly from Stewart International Airport to London Heathrow Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Stewart International Airport to London Heathrow Airport on Thursday, October 16, 2025.

Can I get a direct flight from Stewart International Airport to London Heathrow Airport?

No airlines currently offer direct flights between Stewart International Airport and London Heathrow Airport. Most routes have one or more stops.

How can I find the best flight deal to London Heathrow?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Stewart International Airport to London Heathrow?

Currently, Allegiant Air offers the cheapest flight tickets to London Heathrow.

Travelling from Stewart International Airport (SWF) to London Heathrow Airport (LHR): what you need to know

London's timezone is UTC+0, making London four hours ahead of New York.
Your SWF to LHR flight won't wait if you're late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.
Travelling during a peak month like July? Public holidays and other popular periods can result in longer queues and delays at airport checkpoints. Play it safe and arrive up to four hours ahead of an international flight and two hours before a domestic departure.
If you'd love to explore a new city along the way, look for a flight with a stopover. To see all your options for tickets from Stewart International Airport to London Heathrow Airport, deselect 'Direct flights only.' Keflavik International Airport is a sought-after stop between SWF and LHR.

How to find the cheapest flights from Stewart International Airport (SWF) to London Heathrow Airport (LHR)

C$432 is currently the best price for a one-way Stewart International Airport to London Heathrow Airport flight. A return flight starts at C$1,393. These fares can change based on availability and demand.
It's usually best to book ahead of time if you're looking for cheap tickets from SWF to LHR. That's because flight prices are based on demand, which tends to rise closer to departure.
If you can be flexible with your travel plans, use the 'Whole month' search tool. It'll find the cheapest price in every month when searching for a flight from Stewart International Airport to London Heathrow Airport.
Save time searching for cheap flights from SWF to LHR by creating a Price Alert. You'll get an email or notification on the app when fares go down.
Tailor your flights using filters. Choose your preferred departure and arrival times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Best' or 'Cheapest' flights from Stewart International Airport to London Heathrow Airport.

Handy information about Stewart International Airport (SWF)

The address for SWF is 1180 1st St.
Stewart International Airport maintains a strong on-time record, so you're unlikely to face delays. Departures from SWF make it to their destination as scheduled 83.75% of the time.
Central New York to Stewart International Airport is around 121 kilometres. Depending on traffic, it'll take you about 1 hour 30 minutes to get there if you're ride-sharing, catching a cab or driving.
Planning to take public transport? You can expect a journey time of around 1 hour 55 minutes.
Need a handy hotel close to SWF? If you're boarding an early flight from Stewart International Airport to London Heathrow Airport, these stays will have you sleeping moments from your departure lounge:

Arriving at London Heathrow Airport (LHR)

If you're getting in on a late Stewart International Airport to London Heathrow Airport flight, nothing beats the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and resting not long after at one of these accommodation options near LHR:
Pick up a London Heathrow Airport rental car and discover London and beyond with your own wheels. Surprice, U-Save and Green Motion are top providers to choose from here.
Lock in the best deal by reserving your vehicle from London Heathrow Airport around one week ahead of your trip.

Getting from London Heathrow Airport (LHR) to central London

London Heathrow Airport to central London has a drive time of about 55 minutes. It's approximately 31 kilometres away.
When travelling on public transport, expect a journey time of about 1 hour.

When to fly to London Heathrow Airport (LHR)

The quietest month for a flight from Stewart International Airport to London Heathrow Airport is February, while July is the busiest. Pick the best time to visit London based on whether you prefer a bustling atmosphere or a more laid-back vibe.
The warmest month in London is July, with the temperature ranging between 11ºC (52ºF) and 26ºC (79ºF). Book your flights from Stewart International Airport to London Heathrow Airport in this month if this is the type of weather you like.
Look for cheap tickets from SWF to LHR in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 0ºC (32ºF) and 9ºC (48ºF) on average.

Explore more of United Kingdom

London has loads to offer, but there are so many other parts of United Kingdom just waiting to be explored. Around 161 kilometres north-west of London, a visit to Birmingham will keep you busy. Start with attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.
If there's time to check out another well-known destination in United Kingdom, consider Bristol, about 177 kilometres west of London. Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park are key reasons to visit.