Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Washington, D.C. to New York
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Southwest flights from Washington, D.C. to Islip, New York
Our best Southwest deals on Washington, D.C. to Islip, New York flight tickets
Frontier flights from Washington, D.C. to Islip, New York
Our best Frontier deals on Washington, D.C. to Islip, New York flight tickets
See travel insights to New York from
How to get the cheapest flight ticket from Washington, D.C. to Islip, New York
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Washington, D.C. and Islip, New York?
What is the cheapest month to fly to Islip, New York?
The month of April is, on average, the cheapest month to fly to Islip, New York from Washington, D.C., with most prices found around $285. If you aren’t able to travel to Islip, New York during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $320.
What is the cheapest day to depart on your flight to Islip, New York?
The cheapest day to depart from Washington, D.C. to Islip, New York is on a Tuesday. Travelers who choose to depart for Islip, New York on a Tuesday will often find tickets for as low as $296. The most expensive day to fly to Islip, New York is Sunday, with ticket prices averaging around $487.
What is the cheapest time of day to depart on your flight to Islip, New York?
Flying to Islip, New York from Washington, D.C. in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $337 when looking at flights departing in the afternoon. Flights to Islip, New York are more costly in the morning, with an average ticket price of $377. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Washington, D.C. to Islip Long Island flight route?
Fly from Baltimore/Washington to Islip Long Island for the best Washington, D.C. - Islip Long Island flight prices
What cabin class options are available on Washington, D.C. to Islip Long Island flights?
There are 1 cabin classes available to choose from on Washington, D.C. to Islip Long Island flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Washington, D.C. to Islip, New York flights?
No. A direct flight is the cheapest option for a flight between Washington, D.C. to Islip, New York.
What is the cheapest airline that flies from Washington, D.C. to Islip Long Island?
Frontier and Southwest are the most popular carriers operating from Washington, D.C. to Islip Long Island
What airlines fly to Islip, New York?
United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Islip, New York from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 6 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.
How many flights depart from Washington, D.C. to Islip, New York on average per day?
2 flights are operational daily from Washington, D.C. to Islip, New York as of June 2025. The most popular departure time for this route is 10:00AM, with 38% of flights per day taking off at noon.
How many flights depart from Washington, D.C. to Islip, New York on average per week?
As of June 2025, 20 flights take off from Washington, D.C. and land in Islip, New York each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.
When to book flights from Washington, D.C. to Islip, New York
Cheap Washington, D.C. to Islip, New York (WAS to ISP) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Islip, New York
Best Price Found | $53 |
|---|---|
Fastest flight time | 1h 10m |
Direct flights | Every day |
Airports in Islip, New York | 1 airport |
How far is Washington, D.C. to Islip Long Island by plane?
The straight-line distance from Washington, D.C. to Islip Long Island is 238.7 mi. Flights usually cover this in 1h 10m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. to Islip Long Island Airport?
Prices for flights from Washington, D.C. to Islip Long Island Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to Islip Long Island Airport?
As of June 2025, there is 1 operator available to choose from for flights from Washington, D.C. to Islip Long Island Airport.
How old do you have to be to fly from Washington, D.C. to Islip Long Island Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to Islip, New York?
Based on momondo bookings for flights between Washington, D.C. and Islip, New York, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 23.00% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 17.89%, Boeing 737 MAX 8 with 14.38%, and Embraer 175 with 6.07%.
What is the most popular airline from Washington, D.C. to Islip, New York?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Islip, New York is Southwest (100% of total bookings).
Best airlines flying from Washington, D.C. to Islip, New York
Compare and see reviews for airlines that fly from Washington, D.C. to Islip, New York with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $250 | Free Cancellation | Rating 8.0 4,278 reviews |
Traveling to a place near New York?
Book flights to New York if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Islip?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Islip. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Washington, D.C. to Islip with flexible booking policies on momondo?
momondo does allow users to show only those flights to Islip from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Washington, D.C. to Islip?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Islip from Washington, D.C..
I’m not ready to book a flight from Washington, D.C. to Islip right now. Can momondo alert me if prices change?
Price alerts on flights to Islip from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.