$69 Cheap Flights from Islip (ISP) to Baltimore (BWI)

View $69 flight on Tue, Oct 21, 2025Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Baltimore Washington Intl. Airport (BWI)

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Cheap Flights from Islip to Baltimore (ISP-BWI)

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Oct 8 - Thu, Oct 9
ISP
Islip
BWI
Baltimore
$137 Roundtrip, found 22 hours ago
$137
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Baltimore, returning Thu, Oct 9, priced at $137 found 22 hours ago
Southwest Airlines
Thu, Aug 21 - Mon, Aug 25
ISP
Islip
BWI
Baltimore
$144 Roundtrip, found 2 days ago
$144
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Aug 21 from Islip to Baltimore, returning Mon, Aug 25, priced at $144 found 2 days ago
Southwest Airlines
Thu, Aug 21 - Mon, Aug 25
ISP
Islip
BWI
Baltimore
$151 Roundtrip, found 2 days ago
$151
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Aug 21 from Islip to Baltimore, returning Mon, Aug 25, priced at $151 found 2 days ago
Southwest Airlines
Mon, Sep 15 - Tue, Sep 16
ISP
Islip
BWI
Baltimore
$177 Roundtrip, found 4 days ago
$177
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Sep 15 from Islip to Baltimore, returning Tue, Sep 16, priced at $177 found 4 days ago
Southwest Airlines
Wed, Oct 8 - Thu, Oct 9
ISP
Islip
BWI
Baltimore
$181 Roundtrip, found 22 hours ago
$181
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Baltimore, returning Thu, Oct 9, priced at $181 found 22 hours ago
Southwest Airlines
Thu, Aug 21 - Mon, Aug 25
ISP
Islip
BWI
Baltimore
$188 Roundtrip, found 2 days ago
$188
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Aug 21 from Islip to Baltimore, returning Mon, Aug 25, priced at $188 found 2 days ago
Southwest Airlines
Wed, Oct 8 - Thu, Oct 9
ISP
Islip
BWI
Baltimore
$197 Roundtrip, found 22 hours ago
$197
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Wed, Oct 8 from Islip to Baltimore, returning Thu, Oct 9, priced at $197 found 22 hours ago
Southwest Airlines
Thu, Aug 21 - Mon, Aug 25
ISP
Islip
BWI
Baltimore
$204 Roundtrip, found 2 days ago
$204
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Aug 21 from Islip to Baltimore, returning Mon, Aug 25, priced at $204 found 2 days ago
Southwest Airlines
Thu, Aug 21 - Mon, Aug 25
ISP
Islip
BWI
Baltimore
$211 Roundtrip, found 2 days ago
$211
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Aug 21 from Islip to Baltimore, returning Mon, Aug 25, priced at $211 found 2 days ago
Frontier Airlines
Sat, Aug 9 - Mon, Aug 11
ISP
Islip
BWI
Baltimore
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Aug 9 from Islip to Baltimore, returning Mon, Aug 11, priced at $214 found 1 day ago
Flights from Islip (ISP) to Baltimore (BWI)
Origin airport
MacArthur
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
Frontier Airlines, Southwest Airlines
Roundtrip price
$137
Distance
219 mi
Average flight time
1 hour 17 mins

Islip to Baltimore Flights

The cheapest times to fly from Islip to Baltimore

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Baltimore are during the month of October. You can find some of the cheapest flights from Islip to Baltimore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Baltimore

Sunday is one of the best days to book for cheap flights from Islip to Baltimore: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Baltimore

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Baltimore in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Baltimore flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Baltimore airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) cost?
You can land affordable return tickets from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) starting from $157. Book a seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving ISP on July 17 2025 and touching down at BWI. The price was last updated on June 29 2025 and has not changed since.
What is the cheapest month to fly from ISP to BWI?
The cheapest flights from ISP to BWI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Fly directly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) on a Southwest Airlines flight.
What is the cheapest airline that flies from ISP to BWI?
With fares starting at $69 for a one-way flight from ISP to BWI, Southwest Airlines is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ISP on August 25 2025. Prices were last updated on June 29 2025 and have not changed since.
How many flights per day from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Every day, an average of 2 direct flights operate from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI). Choose the departure date that best fits your itinerary.
What are the most popular departure times for flights from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
More travelers fly between ISP and BWI at 3 PM than at any other point in the day. Rather skip the crowds? Pick a flight outside the busiest times and there's a chance you'll save on your fare as well.
What day of the week has the most flights from ISP to BWI?
Jet off on a Friday if you're searching for the best choice of flights from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
What is the earliest flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
The first flight of the day jetting off from MacArthur Airport (ISP) is at around 5:35AM UTC-5. Hop on this flight and you'll reach Baltimore Washington Intl. Thurgood Marshall Airport (BWI) at approximately 6:55AM UTC-5. The overall travel time is 1h 20m.
How long does it take to fly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
It usually takes 1 hour and 26 minutes to fly the 220 mi from ISP to BWI.
What is the best time to fly from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Select a flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Baltimore from MacArthur Airport (ISP)?
If you're taking a direct flight from MacArthur Airport (ISP) to Baltimore, Baltimore Washington Intl. Thurgood Marshall Airport (BWI) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) last-minute?
Holding off until just before your departure to book a flight from ISP to BWI often results in higher prices. While you might find some last-minute deals, they're not always guaranteed. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book an ISP to BWI flight and hotel package?
Compared with arranging hotels and flights separately, booking an ISP to BWI flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of travel planning. Simply pick your flights and select from our wide range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
It's generally possible to cancel or reschedule your ISP to BWI flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.