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Cheap Flights from Islip to Washington D.C.

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Find the cheapest month to fly from Islip to Washington D.C.

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Islip to Washington D.C. flights are currently cheapest in June.
May
from R 3,582
Jun
from R 1,593
Jul
from R 2,682
Aug
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Sep
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Oct
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Nov
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Dec
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Jan
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Feb
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Mar
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Apr
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Direct flights from Islip to Washington D.C.

Alternative Islip to Washington D.C. routes

Looking for the cheapest, fastest or easiest route from Islip to Washington D.C.? You could fly into the following airports instead.

Islip to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight foundR 1,593
Cheapest month to flyJune
Average flight time1 hr, 18 mins
Most popular airlineSouthwest Airlines
Average flights per week22

Finding cheap flights from Islip to Washington D.C.: Frequently asked questions

There are 5 airports in Washington D.C.: Washington Ronald Reagan, Camp Springs Andrews AFB, Washington Dulles, Baltimore Washington International, and Manassas.
The best price we found for a return flight from Islip to Washington D.C. is R 3,356. 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.
1 hour and 18 minutes is the average flight time from Islip to Washington D.C..
Southwest Airlines flies direct from Islip to Washington D.C..
As of May 2025, there are 22 flights per week flying from Islip to Washington D.C..
The cheapest month to fly from Islip to Washington D.C. is usually May 2025.
If you're flying from Islip Airport, the cheapest airport near Washington D.C. is Baltimore Washington International – which is 43.6 km away from the centre of Washington D.C.. We've found flights into this airport from R 3,356.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Islip Airport to Washington D.C. on Tuesday, 10 June 2025.
Yes – the average flight time is 1 hour and 18 minutes.
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 Washington D.C. 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.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.
In May, the average temperature is usually around 17°C. July is typically the warmest month in Washington D.C., when it usually averages around 31°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -4°C. The rainiest month is September.
Currently, Southwest Airlines offers the cheapest flight tickets to Washington D.C..

Travelling from Long Island MacArthur Airport (ISP) to Washington DC: what you need to know

  • Washington DC and Islip (where Long Island MacArthur Airport is located) share the UTC-4 timezone. That means you won't need to account for any time differences.

  • Long Island MacArthur Airport (ISP) to Baltimore/Wash International Thurgood Marshall Airport (BWI) is the most traveled route, with 14 flights a week to pick from. If you have things to finalize before heading off, the last flight from ISP to BWI is with Southwest Airlines at 18:30. Go for the first departure with Southwest Airlines at 05:25 if you want to fly out earlier.

  • For stress-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably catch your ISP to Washington DC flight.

  • Delays at check-in and security are more likely if you're heading away during high season, so give yourself some extra breathing space. A good rule for peak times? Arrive up to four hours ahead for international flights and two hours for domestic departures.

  • You can book a direct Long Island MacArthur Airport to Washington DC ticket. Begin your journey at ISP and touch down at Baltimore/Wash International Thurgood Marshall Airport (BWI).

  • Southwest Airlines is a leading airline that offers direct flights from Long Island MacArthur Airport to Washington DC.

  • Travelling from central Islip to ISP takes around 1 hour 10 minutes on public transport. If you drive, ride-share or get a cab, you'll cover the 11 kilometres in 15 minutes or so, depending on traffic.

  • Want a relaxed start to your travels? Stay near ISP. Whether you're catching an early flight from Long Island MacArthur Airport to Washington DC or just don't want to be rushed, these hotels are worth a look:

  • 77.45% of flights leaving from Long Island MacArthur Airport reach their destination on schedule.

  • ISP is located at 100 Arrivals Avenue.

How to find the cheapest flights from Long Island MacArthur Airport (ISP) to Washington DC

  • R 1,593 is currently the lowest price for a one-way Long Island MacArthur Airport to Washington DC flight. Return flight tickets start at R 3,356. These fares may change depending on availability and demand.

  • Book one month before you want to fly. Research on pricing trends suggests this is the ideal window for finding cheap flights from ISP to Washington DC.

  • The best month for picking up cheap Long Island MacArthur Airport to Washington DC tickets is May. Use the 'Whole month' tool to compare flight prices, then choose the dates offering the lowest fares.

  • Spend less time searching for cheap flights from ISP to Washington DC by creating a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Save money on your flight from Long Island MacArthur Airport to Washington DC with the help of our filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

  • The distance from Ronald Reagan National Airport (DCA) to central Washington DC is roughly 8 kilometres. It'll take you about 15 minutes to get to the centre driving.

  • It typically takes 45 minutes to get there using public transport.

  • If you're arriving on a late flight from Long Island MacArthur Airport to Washington DC, nothing beats the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and snoozing soon after at one of these hotels near DCA:

  • Go where the road takes you with a Ronald Reagan National Airport rental car. Pick up your wheels from Thrifty, Sixt or Dollar and chase adventure across Washington DC and beyond.

  • Secure the lowest price by booking your ride from Ronald Reagan National Airport about four weeks in advance of your flight from ISP to Washington DC.

  • You'll find DCA at 1 Aviation Circle.

Washington Dulles International Airport (IAD)

  • Once your flight from Long Island MacArthur Airport to Washington DC has touched down, you can reach the city centre in about 50 minutes by car. Central Washington DC is roughly 56 kilometres from Washington Dulles International Airport (IAD).

  • If you choose to travel on public transport, you'll get to the city centre in 1 hour 10 minutes or so.

  • Following your ISP to Washington DC flight, unwind at a hotel close to IAD. These are some great accommodation options that'll help you get into relaxation mode:

  • Dollar, Thrifty and Sixt make collecting a Washington Dulles International Airport rental car simple. These trusted providers are located in or around the terminal and will get you on your way in no time.

  • Get exactly what you want. Booking your ride from IAD one week in advance often means better deals and a greater range of vehicles.

  • The address for Washington Dulles International Airport is 1 Saarinen Circle.

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • Baltimore/Wash International Thurgood Marshall Airport (BWI) is around 48 kilometres from central Washington DC. It'll take you about 50 minutes to get to the city centre by cab or ride-share once you've hopped off your flight from Long Island MacArthur Airport to Washington DC.

  • Public transport can take you there in about 1 hour 30 minutes.

  • If you don't want to travel to the centre, choose a hotel near BWI. Get settled at one of these stays after your ISP to Washington DC flight:

  • Begin your journey without stressing about how to reach your next stop with a Baltimore/Wash International Thurgood Marshall Airport rental car. You can book a set of wheels from reliable companies here like Dollar, Thrifty and Budget.

  • About two weeks before your flight from Long Island MacArthur Airport to Washington DC is a good time to secure your vehicle from BWI. You're more likely to find a cheaper rate or score some early bird savings.

Best time to go to Washington DC

  • Before securing your flights from Long Island MacArthur Airport to Washington DC, consider which time of year works best for you. Peak season in Washington DC offers a lively atmosphere and plenty of things to do, while the off-season brings better deals on hotels and fewer crowds.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC (66ºF) and 33ºC (91ºF). Book your Long Island MacArthur Airport to Washington DC flight ticket then if this is the type of weather you enjoy.

  • Search for cheap tickets from ISP to Washington DC in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -6ºC (21ºF) and 10ºC (50ºF) on average.

More about Washington DC

Explore more of United States

  • You've visited Washington DC, now it's time to explore other parts of United States. Travel about 322 kilometres north-east to New York to check off its popular sights. From Statue of Liberty to Central Park and Empire State Building, there's plenty to keep you on the go.

  • If you want to check out another major destination in United States, consider Philadelphia, about 193 kilometres north-east of Washington DC. Liberty Bell, Independence Hall and Philadelphia Museum of Art are among its highlights.

Plan the rest of your trip from Islip to Washington D.C.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.