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 Islip, New York to Washington, D.C.
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Southwest flights from Islip, New York to Washington, D.C.
Our best Southwest deals on Islip, New York to Washington, D.C. flight tickets
JetBlue flights from Islip, New York to Washington, D.C.
Our best JetBlue deals on Islip, New York to Washington, D.C. flight tickets
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from Islip, New York to Washington, D.C.
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 cheapest month to fly to Washington, D.C.?
The month of May is, on average, the cheapest month to fly to Washington, D.C. from Islip, New York, with most prices found around $295. If you’re not able to fly to Washington, D.C. in May, then July is your next best option. Flight prices from Islip, New York to Washington, D.C. during July average around $297.
What is the cheapest day to depart on your flight to Washington, D.C.?
On average, the least expensive day to fly to Washington, D.C. from Islip, New York is on a Friday. momondo users have found tickets for Friday departures for as low as $367. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Islip, New York to Washington, D.C. for around $471.
What is the cheapest time of day to depart on your flight to Washington, D.C.?
In the morning is the cheapest time of day to fly from Islip, New York to Washington, D.C. when you can find flight prices for as low as $387. Flying to Washington, D.C. in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $492. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Islip Long Island to Washington, D.C. flight route?
Fly from Islip Long Island to Baltimore/Washington for the best Islip Long Island - Washington, D.C. flight prices
What is the cheapest airline that flies from Islip Long Island to Washington, D.C.?
Southwest, JetBlue, and Frontier are the most popular carriers operating from Islip Long Island to Washington, D.C.
What airlines fly to Washington, D.C.?
United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Washington, D.C. from Islip, New York according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 6 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.
How many flights depart from Islip, New York to Washington, D.C. on average per day?
The number of flights available between Islip, New York and Washington, D.C. is 2 per day as of April 2025. The most frequent departure time is 5:00AM, with 28% of daily flights leaving in the morning.
How many flights depart from Islip, New York to Washington, D.C. on average per week?
As of April 2025, there are 20 flights per week flying from Islip, New York to Washington, D.C.. The most common day of the week flights depart is Mon, with 20% of flights taking off on this day.
When to book flights from Islip, New York to Washington, D.C.
Cheap Islip, New York to Washington, D.C. (ISP to WAS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Washington, D.C.
Best Price Found | $89 |
|---|---|
Fastest flight time | 1h 15m |
Direct flights | Mon, Wed, Thu, Fri, Sat and Sun |
Airports in Washington, D.C. | 2 airports |
How far is Islip Long Island to Washington, D.C. by plane?
A flight from Islip Long Island to Washington, D.C. will travel around 238.7 mi. A reasonable flight in good conditions will take 1h 15m.
When did momondo last update prices for flights from Islip Long Island Airport to Washington, D.C.?
Prices for flights from Islip Long Island Airport to Washington, D.C. are updated daily.
How many operators does momondo search for flights from Islip Long Island Airport to Washington, D.C.?
As of April 2025, there is 1 operator available to choose from for flights from Islip Long Island Airport to Washington, D.C..
How old do you have to be to fly from Islip Long Island Airport to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Islip, New York to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Islip, New York to Washington, D.C. is Airbus A320neo (15.91% of total bookings). The next most popular plane models are Airbus A321neo (11.27%), Airbus A320 (sharklets) (9.03%), and Boeing 737-700 Passenger/BBJ1 (winglets) (7.37%).
What is the most popular airline from Islip, New York to Washington, D.C.?
momondo data reveals that the most frequently booked airline on the route from Islip, New York to Washington, D.C. is Southwest, representing 100% of all bookings.
Best airlines flying from Islip, New York to Washington, D.C.
Compare and see reviews for airlines that fly from Islip, New York to Washington, D.C. with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $278 | Free Cancellation | Rating 8.0 4,287 reviews |
Traveling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Islip to Washington, D.C.?
It is quick and easy to find Islip to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.
Can I find flights from Islip to Washington, D.C. with flexible booking policies on momondo?
All flight searches from Islip to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Islip to Washington, D.C.?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to Washington, D.C..
I’m not ready to book a flight from Islip to Washington, D.C. right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from Islip and alert you when they change.