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237 € Cheap Flights from Washington D.C. to Islip

Compare Washington D.C. to Islip flight deals

Find the cheapest month or even day of the year to fly to Islip

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Flight deals from Washington D.C. to Islip Airport

Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Islip Airport? If you want to travel next month, return fares start from 237 €. Find the lowest prices on one-way and return tickets right here.
Islip.237 € per passenger.Departing Thu, 23 Apr, returning Sun, 26 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 23 Apr, arriving in Islip.Inbound indirect flight with Frontier Airlines, departs from Islip on Sun, 26 Apr, arriving in Washington Dulles.Price includes taxes and charges.From 237 €, select.
Islip.247 € per passenger.Departing Sat, 2 May, returning Fri, 8 May.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Baltimore Washington International on Sat, 2 May, arriving in Islip.Inbound direct flight with Southwest Airlines departs from Islip on Fri, 8 May, arriving in Baltimore Washington International.Price includes taxes and charges.From 247 €, select.
Islip.293 € per passenger.Departing Fri, 28 Aug, returning Sun, 30 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Baltimore Washington International on Fri, 28 Aug, arriving in Islip.Inbound direct flight with Southwest Airlines departs from Islip on Sun, 30 Aug, arriving in Baltimore Washington International.Price includes taxes and charges.From 293 €, select.
Islip.311 € per passenger.Departing Fri, 4 Sep, returning Mon, 7 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Baltimore Washington International on Fri, 4 Sep, arriving in Islip.Inbound direct flight with Southwest Airlines departs from Islip on Mon, 7 Sep, arriving in Baltimore Washington International.Price includes taxes and charges.From 311 €, select.
Islip.331 € per passenger.Departing Fri, 17 Jul, returning Wed, 22 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Baltimore Washington International on Fri, 17 Jul, arriving in Islip.Inbound indirect flight with Frontier Airlines, departs from Islip on Wed, 22 Jul, arriving in Baltimore Washington International.Price includes taxes and charges.From 331 €, select.
Islip.332 € per passenger.Departing Sat, 4 Apr, returning Sun, 5 Apr.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Baltimore Washington International on Sat, 4 Apr, arriving in Islip.Inbound direct flight with Southwest Airlines departs from Islip on Sun, 5 Apr, arriving in Baltimore Washington International.Price includes taxes and charges.From 332 €, select.
Islip.363 € per passenger.Departing Thu, 26 Mar, returning Mon, 30 Mar.Return flight with Allegiant Air and Breeze Airways.Outbound indirect flight with Allegiant Air, departs from Washington Dulles on Thu, 26 Mar, arriving in Islip.Inbound indirect flight with Breeze Airways, departs from Islip on Mon, 30 Mar, arriving in Baltimore Washington International.Price includes taxes and charges.From 363 €, select.
Islip.459 € per passenger.Departing Fri, 20 Mar, returning Mon, 23 Mar.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Baltimore Washington International on Fri, 20 Mar, arriving in Islip.Inbound direct flight with Southwest Airlines departs from Islip on Mon, 23 Mar, arriving in Baltimore Washington International.Price includes taxes and charges.From 459 €, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington D.C. to Islip flights are currently cheapest in April.
Mar
from 363 €
Apr
from 237 €
May
from 247 €
Jun
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Jul
from 331 €
Aug
from 293 €
Sep
from 311 €
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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Direct flights from Washington D.C. to Islip

Washington D.C. to Islip: Alternative routes

Compare routes from Washington D.C. to Islip below. You may find an airport to fly into that's cheaper, faster, or easier than Islip.

Islip

12km from central Islip
Closest
from 237 €
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Bridgeport

49km from central Islip
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New York John F. Kennedy

49km from central Islip
from 119 €
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Westchester County

56km from central Islip
from 429 €
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New York LaGuardia

56km from central Islip
Cheapest
from 107 €
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New Haven

65km from central Islip
from 151 €
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New York Newark

81km from central Islip
from 124 €
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Washington D.C. to Islip: Flight information

The things to know before you go.
Cheapest flight found237 €
Cheapest month to flyApril
Average flight time1 hr, 11 mins
Most popular airlineSouthwest Airlines
Average flights per week29

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

The best price we found for a return flight from Washington D.C. to Islip is 237 €. 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 11 minutes is the average flight time from Washington D.C. to Islip.
Southwest Airlines flies direct from Washington D.C. to Islip.
As of March 2026, there are 29 flights per week flying from Washington D.C. to Islip.
The cheapest month to fly from Washington D.C. to Islip is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Islip Airport on Thursday, 23 April 2026.
Yes – the average flight time is 1 hour and 11 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 Islip 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 Islip is around 40 days in advance, so don’t leave your flight to the last minute.

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

  • Get your trip planning underway by looking up the most convenient place to catch your flight from Washington DC to Long Island MacArthur Airport (ISP). Explore your options for leaving from Ronald Reagan National Airport (DCA) or Washington Dulles International Airport (IAD), the city's main airports.

  • Long Island MacArthur Airport is located in Islip. The city's timezone is UTC-4 — the same as Washington DC.

  • Arrive at the airport on time so you don't miss your flight from Washington DC to ISP. Be there at least two hours ahead for international flights and an hour early for domestic departures to skip the mad dash to your gate.

  • Peak season means busier airports, so show up even earlier. Give yourself at least two hours before a domestic flight and four hours for an international journey to stick to your schedule.

Airports in Washington DC

Ronald Reagan National Airport (DCA)

  • DCA is around 8 kilometres from central Washington DC. If you're driving, catching a cab or ride-sharing from the centre, it'll take 15 minutes or so to get there, depending on the traffic. If you're taking public transport, expect the trip time to be around 45 minutes.

  • Catching an early flight from Washington DC to Long Island MacArthur Airport? Avoid rushing to the terminal (and get a little more snooze time) by choosing one of these hotels near Ronald Reagan National Airport:

  • When it comes to the on-time performance of Ronald Reagan National Airport, data shows 76.44% of flights stick to their scheduled arrival time.

  • DCA's address is 1 Aviation Circle.

Washington Dulles International Airport (IAD)

Baltimore/Wash International Thurgood Marshall Airport (BWI)

  • One flight, no fuss. You can book a direct flight from Washington DC to Long Island MacArthur Airport leaving from Baltimore/Wash International Thurgood Marshall Airport (BWI).

  • Get on board with Southwest Airlines. It offers direct Washington DC to ISP plane tickets from BWI.

  • The preferred airline for passengers flying between BWI and ISP is Southwest Airlines.

  • The carrier with the most reliable on-time performance on this route is Southwest Airlines. Its services land without delay 77.22% of the time.

  • The journey to BWI from central Washington DC is around 1 hour 30 minutes on public transport. If you prefer to travel by car, it'll take you about 50 minutes to cover the 48 kilometres or so.

  • Make catching an early Washington DC to Long Island MacArthur Airport flight the easiest part of your journey. Book a room at one of these accommodation options near Baltimore/Wash International Thurgood Marshall Airport and get to your gate feeling relaxed and unhurried:

  • The on-time performance record of BWI is 77.13%. In other words, that's how often flights from this airport reach their final stop as planned.

About Long Island MacArthur Airport (ISP)

Getting from Long Island MacArthur Airport (ISP) to central Islip

  • Long Island MacArthur Airport to central Islip is roughly 11 kilometres. If you're taking a cab or renting a car, do a little research to make your trip as smooth as possible. Journey times will vary based on traffic and the time of day.

  • Travelling on public transport takes around 1 hour 10 minutes.

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

  • Currently, 121 € is the best price we've found for a one-way ticket from Washington DC to Long Island MacArthur Airport. The cheapest price for a return flight is 237 €. Keep in mind fares may change due to availability at the time of booking.

  • Score cheap flights from Washington DC to ISP by booking one month ahead. According to our research, that's the sweet spot for finding a bargain.

  • June is when you're most likely to land a bargain on a Washington DC to Long Island MacArthur Airport ticket. If you'd like to travel during a different time of year, the 'Whole month' tool will show you the lowest prices across every month.

  • Snapping up a cheap plane ticket from Washington DC to ISP is a breeze with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when the price has dropped.

  • Hunt down a great price on a flight from Washington DC to Long Island MacArthur Airport with the help of the filters. Pick your ideal departure and arrival times, number of stops and airlines. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best.'

The best time to fly from Washington DC to Long Island MacArthur Airport (ISP)

  • It's time to work out your travel dates for your flight from Washington DC to Long Island MacArthur Airport (ISP). August is when most people visit Islip. If you're all about a more relaxed kind of trip, think about going in May.

  • Lock in a Washington DC to ISP plane ticket departing in July if you're eager to visit the city during its warmest month. You can expect temperatures in Islip to range from 19ºC (66ºF) to 29ºC (84ºF).

  • Search for cheap tickets from Washington DC to Long Island MacArthur Airport in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -4ºC (25ºF) and 8ºC (46ºF).

More about Islip

Explore more of the United States

  • You've done Islip, now it's time to discover other corners of the United States. Travel about 193 kilometres south-west to Philadelphia to check off its leading sights. From Independence Hall to Liberty Bell and Philadelphia Museum of Art, there's plenty to keep you busy.

  • If you're looking to explore another side of the United States, head for Boston, roughly 241 kilometres north-east of Islip. Museum of Fine Arts Boston, Freedom Trail and Quincy Market are highlights.

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

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