Cheap flights from Washington, D.C. (WAS) to Islip (ISP) from $135

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. to Islip, New York (average of $78). Flying from Washington, D.C. to Islip, New York in February is currently the most expensive (average of $151). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

• What airport do you fly into for flights to Islip from Washington, D.C.?

  Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from Washington, D.C.. Booking flights from Washington, D.C. to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. from 0 different airlines.

• Can I find flights from Washington, D.C. to Islip, New York for under $300 on Cheapflights?

  Yes, there are multiple flights from Washington, D.C. to Islip, New York for under $300. The cheapest flight booked recently is on Frontier for just $237, but on average you can expect to pay $333.

• Are there last-minute flights available from Washington, D.C. to Islip, New York for under $600?

  There are currently 2+ open flights from Washington, D.C. to Islip, New York within the next 7 days for less than $600.

• What is the cheapest airline to fly from Washington, D.C. to Islip, New York round-trip?

  Currently priced at $237, Frontier will fly you from Washington, D.C. to Islip, New York and back. In addition to Frontier, many other airlines offer competitively priced options for your trip.

• What are the most popular routes from Washington, D.C. to Islip, New York?

  When deciding which route to take from Washington, D.C. to Islip, New York consider Baltimore/Washington - Islip Long Island, Washington, D.C. Dulles Intl - Islip Long Island or Washington, D.C. Reagan-National - Islip Long Island as they are the most popular.

• What does IAD to ISP mean?

  These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Washington, D.C. Dulles Intl Airport to Islip Long Island Airport flight would often be abbreviated as a IAD to ISP flight. Baltimore/Washington Airport (BWI), Washington, D.C. Reagan-National Airport (DCA) are some additional IATA codes for airports related to your trip.

• Can I find deals for flights from Washington, D.C. to Islip that include extra baggage allowance?

  The amount of baggage you can bring on your Washington, D.C. to Islip flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

• Can I find deals on flights from Washington, D.C. to Islip with specific airlines?

  Yes, Cheapflights allows you to browse and filter Washington, D.C. to Islip flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

• Can I find deals for flights from Washington, D.C. to Islip that include hotel bookings?

  Yes. In addition to deals on Washington, D.C. to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

• How can I find direct flights from Washington, D.C. to Islip?

  After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Islip.

• Can I find deals for business class flights from Washington, D.C. to Islip?

  Yes. Cheapflights offers flight deals from Washington, D.C. to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

• Can I find deals for flights from Washington, D.C. to Islip that allow pets onboard?

  Many airlines flying from Washington, D.C. to Islip offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

• Can I find deals on last-minute flights from Washington, D.C. to Islip?

  Yes, you can often find last-minute deals on Washington, D.C. to Islip flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

• How recently were the Washington, D.C. to Islip, New York flight deals updated?

  The Washington, D.C. to Islip, New York flight deals you see on this page were last updated on 5/16.