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Cheap flights from Islip to Washington

24 nonstop flights a week, 3 of them today. Operated by Southwest Airlines, about 1h 20m in the air, 247 mi (397 km). Tickets from $203, nonstop from $364.

Flights from Islip to Washington

Pick a departure date to see flights and seller prices

We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.

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Best fares from Islip to Washington

Lowest one-way prices found by recent searches for the next 120 days; press a card to search that date

Cheapest one-way $203 20 November 2026, with a connection Cheapest nonstop $364 21 November 2026, Southwest Airlines Cheapest weekend departure $203 Fri, 20 November 2026 Cheapest month November 2026 tickets from $203

Islip to Washington at a glance

flight time, from 1h 15m to 1h 35m
1h 20m
straight-line distance
247 mi (397 km)
flights a week
24
flights today
3
first and last departure
05:30 - 17:40
lowest price, with a connection, 20 November
$203
lowest nonstop price
$364
airline
1

Islip to Washington flight schedule

24 flights a week, 3 today, 52 seasonal or one-off. Departure and arrival times are local.

FlightDepartsArrivesDurationDaysAircraft
WN 4506
Southwest Airlines
05:30 Long Island MacArthur
06:50 Baltimore/Wash International Thurgood Marshall
1h 20m
Sat
WN 4506
Southwest Airlines
05:35 Long Island MacArthur
06:55 Baltimore/Wash International Thurgood Marshall
1h 20m
Mon, Thu, Fri, Sun
WN 4506
Southwest Airlines
06:00 Long Island MacArthur
07:20 Baltimore/Wash International Thurgood Marshall
1h 20m
Sat
WN 4506
Southwest Airlines
06:05 Long Island MacArthur
07:20 Baltimore/Wash International Thurgood Marshall
1h 15m
Mon, Tue, Wed, Thu
WN 2209
Southwest Airlines
12:25 Long Island MacArthur
13:45 Baltimore/Wash International Thurgood Marshall
1h 20m
Mon, Thu, Fri, Sun
Boeing 737
WN 2209
Southwest Airlines
12:30 Long Island MacArthur
13:45 Baltimore/Wash International Thurgood Marshall
1h 15m
Mon, Tue, Wed, Thu
WN 2209
Southwest Airlines
12:45 Long Island MacArthur
14:05 Baltimore/Wash International Thurgood Marshall
1h 20m
Sat
Boeing 737
WN 858
Southwest Airlines
15:30 Long Island MacArthur
16:50 Baltimore/Wash International Thurgood Marshall
1h 20m
Sat
WN 443
Southwest Airlines
16:05 Long Island MacArthur
17:25 Baltimore/Wash International Thurgood Marshall
1h 20m
Mon, Tue, Wed, Thu
WN 849
Southwest Airlines
17:05 Long Island MacArthur
18:25 Baltimore/Wash International Thurgood Marshall
1h 20m
Sat
Boeing 737-800
WN 2210
Southwest Airlines
17:40 Long Island MacArthur
19:00 Baltimore/Wash International Thurgood Marshall
1h 20m
Mon, Thu, Fri, Sun

Seasonal and one-off flights

Not operating in the next two weeks. The first of them is on 24 November.

FlightDepartsArrivesDurationDaysAircraft
WN 200
Southwest Airlines
12:10 Long Island MacArthur
13:25 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 309
Southwest Airlines
16:55 Long Island MacArthur
18:15 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 4506
Southwest Airlines
05:45 Long Island MacArthur
07:05 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 2209
Southwest Airlines
11:40 Long Island MacArthur
12:55 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 4506
Southwest Airlines
05:25 Long Island MacArthur
06:45 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 1517
Southwest Airlines
13:35 Long Island MacArthur
14:55 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737
WN 2835
Southwest Airlines
17:50 Long Island MacArthur
19:10 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 849
Southwest Airlines
05:45 Long Island MacArthur
07:15 Baltimore/Wash International Thurgood Marshall
1h 30m
Seasonal
Boeing 737-800
WN 1991
Southwest Airlines
15:50 Long Island MacArthur
17:10 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 849
Southwest Airlines
05:40 Long Island MacArthur
07:10 Baltimore/Wash International Thurgood Marshall
1h 30m
Seasonal
Boeing 737-800
WN 498
Southwest Airlines
15:40 Long Island MacArthur
17:00 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 849
Southwest Airlines
05:35 Long Island MacArthur
07:05 Baltimore/Wash International Thurgood Marshall
1h 30m
Seasonal
WN 1991
Southwest Airlines
16:30 Long Island MacArthur
17:50 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 849
Southwest Airlines
05:50 Long Island MacArthur
07:20 Baltimore/Wash International Thurgood Marshall
1h 30m
Seasonal
Boeing 737-800
WN 910
Southwest Airlines
10:00 Long Island MacArthur
11:35 Baltimore/Wash International Thurgood Marshall
1h 35m
Seasonal
Boeing 737-800
WN 1991
Southwest Airlines
17:30 Long Island MacArthur
18:50 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 849
Southwest Airlines
05:30 Long Island MacArthur
07:00 Baltimore/Wash International Thurgood Marshall
1h 30m
Seasonal
Boeing 737-800
WN 748
Southwest Airlines
15:30 Long Island MacArthur
16:50 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737
WN 4903
Southwest Airlines
05:35 Long Island MacArthur
06:55 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 1845
Southwest Airlines
09:50 Long Island MacArthur
11:05 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 1231
Southwest Airlines
17:20 Long Island MacArthur
18:40 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 2353
Southwest Airlines
06:00 Long Island MacArthur
07:20 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 4903
Southwest Airlines
06:00 Long Island MacArthur
07:20 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 2980
Southwest Airlines
12:20 Long Island MacArthur
13:40 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 2090
Southwest Airlines
17:45 Long Island MacArthur
19:05 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 1845
Southwest Airlines
12:20 Long Island MacArthur
13:40 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
WN 4074
Southwest Airlines
16:45 Long Island MacArthur
18:00 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 4893
Southwest Airlines
05:45 Long Island MacArthur
07:00 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 1103
Southwest Airlines
09:15 Long Island MacArthur
10:30 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 4146
Southwest Airlines
12:35 Long Island MacArthur
13:50 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 2620
Southwest Airlines
16:10 Long Island MacArthur
17:30 Baltimore/Wash International Thurgood Marshall
1h 20m
Seasonal
Boeing 737-800
WN 4893
Southwest Airlines
05:50 Long Island MacArthur
07:05 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1124
Southwest Airlines
07:55 Long Island MacArthur
09:10 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 883
Southwest Airlines
12:25 Long Island MacArthur
13:40 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 4893
Southwest Airlines
06:00 Long Island MacArthur
07:15 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 1766
Southwest Airlines
12:35 Long Island MacArthur
13:50 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1695
Southwest Airlines
16:50 Long Island MacArthur
18:05 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737-800
WN 2147
Southwest Airlines
12:15 Long Island MacArthur
13:30 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1896
Southwest Airlines
05:45 Long Island MacArthur
07:00 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 2134
Southwest Airlines
11:25 Long Island MacArthur
12:40 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1928
Southwest Airlines
12:50 Long Island MacArthur
14:05 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1899
Southwest Airlines
18:00 Long Island MacArthur
19:15 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1896
Southwest Airlines
05:55 Long Island MacArthur
07:10 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1928
Southwest Airlines
12:40 Long Island MacArthur
13:55 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1899
Southwest Airlines
17:15 Long Island MacArthur
18:30 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 2134
Southwest Airlines
11:05 Long Island MacArthur
12:20 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1928
Southwest Airlines
13:05 Long Island MacArthur
14:20 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1899
Southwest Airlines
17:55 Long Island MacArthur
19:10 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 1896
Southwest Airlines
05:50 Long Island MacArthur
07:05 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737
WN 2134
Southwest Airlines
12:15 Long Island MacArthur
13:30 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1928
Southwest Airlines
14:20 Long Island MacArthur
15:35 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
WN 1899
Southwest Airlines
16:40 Long Island MacArthur
17:55 Baltimore/Wash International Thurgood Marshall
1h 15m
Seasonal
Boeing 737

Days of the week are taken from the schedule for the next 14 days; schedules change by season. The search shows seat availability and the price for your date.

Airlines flying Islip to Washington

Flights a week by schedule and the cheapest nonstop fare of each airline found by recent searches

Southwest Airlines24 a week

Airports

Where flights from Islip to Washington depart and land

Departure from Islip

Long Island MacArthur ISP

24 flights a week, 0 mi (0 km) from the city centre

About the airport

Arrival in Washington

Baltimore/Wash International Thurgood Marshall BWI

24 flights a week, 28 mi (45 km) from the city centre

About the airport

When to visit Washington

Weather by month

Best time to visit: April, May, September and October, +20° to +26° by day. In November it is +14° by day and +4° at night, with 8 rainy days.

Jan
+6° −2° 8 days
Feb
+9° −1° 10 days
Mar
+15° +3° 8 days
Apr
+20° +8° 11 days
May
+24° +13° 12 days
Jun
+29° +18° 12 days
Jul
+31° +21° 16 days
Aug
+30° +20° 13 days
Sep
+26° +17° 11 days
Oct
+20° +10° 8 days
Nov
+14° +4° 8 days
Dec
+9° 0° 9 days

Daytime and night temperatures in °C, rainy days. Months with the most comfortable weather are in green. Long-term averages.

Frequently asked questions

How long is the flight from Islip to Washington?
A nonstop flight takes 1 hour 20 minutes on average, from 1h 15m to 1h 35m depending on the flight.
How far is Washington from Islip?
247 mi (397 km) in a straight line between the cities.
Which airlines fly nonstop from Islip to Washington?
Southwest Airlines (24 a week).
How many flights a day are there from Islip to Washington?
3 flights today and 24 a week, about 3.4 a day on average.
When are the first and last flights from Islip to Washington?
The first departure is at 05:30 (WN4506), the last at 17:40 (WN2210). Local time.
What is the cheapest upcoming date to fly from Islip to Washington?
20 November 2026 (Friday): from $203 one way, with a connection, by recent searches. The search shows the price for your dates.
Which airline is the cheapest from Islip to Washington?
Southwest Airlines: nonstop tickets from $364 on 21 November by recent searches. Prices change daily, so compare the sellers in the search.
Which Islip airport do flights to Washington leave from?
Long Island MacArthur (24 a week).