$224 Cheap Flights from Spokane (GEG) to Islip (ISP)

View $224 flight on Thu, Oct 2, 2025Opens in a new window

Popular airlines from Spokane International Airport (GEG) to MacArthur Airport (ISP)

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Cheap Flights from Spokane to Islip (GEG-ISP)

Prices were available within the past 7 days and start at $224 for one-way flights and $437 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$437 Roundtrip, found 6 days ago
$437
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $437 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$442 Roundtrip, found 6 days ago
$442
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $442 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$447 Roundtrip, found 6 days ago
$447
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $447 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$452 Roundtrip, found 6 days ago
$452
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $452 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$457 Roundtrip, found 6 days ago
$457
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $457 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$459 Roundtrip, found 6 days ago
$459
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $459 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$462 Roundtrip, found 6 days ago
$462
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $462 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$468 Roundtrip, found 6 days ago
$468
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $468 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$469 Roundtrip, found 6 days ago
$469
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $469 found 6 days ago
Southwest Airlines
Thu, Oct 2 - Sun, Oct 5
GEG
Spokane
ISP
Islip
$473 Roundtrip, found 6 days ago
$473
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Oct 2 from Spokane to Islip, returning Sun, Oct 5, priced at $473 found 6 days ago
Flights from Spokane (GEG) to Islip (ISP)
Origin airport
Spokane Intl.
Destination airport
MacArthur
Airlines serving
Southwest Airlines
Roundtrip price
$437
Distance
2219 mi

Spokane to Islip Flights

The cheapest times to fly from Spokane to Islip

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 Spokane to Islip are during the month of October. You can find some of the cheapest flights from Spokane to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Spokane to Islip

Sunday is one of the best days to book for cheap flights from Spokane to Islip: 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 Spokane to Islip

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 Spokane to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $224 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 Spokane to Islip 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 Spokane to Islip 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 Spokane Intl. Airport (GEG) to MacArthur Airport (ISP) cost?
Secure a cheap one-way flight from $224 or cheap return flight from $437 from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP)?
Planning your getaway for October can help you save, as it's the cheapest month for flights between GEG and ISP. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP)?
To find the cheapest airline that'll fly you from GEG to ISP, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP)?
Direct flights from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from GEG to ISP?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP)?
To avoid possible delays on the Spokane Intl. Airport (GEG) to MacArthur Airport (ISP) route, aim to fly before 3 PM. Flights after this time are 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.
Is it cheaper to buy a plane ticket from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP) last-minute?
Last-minute fares from GEG to ISP are typically more expensive. To lock in the best prices, start searching for flights well ahead of time. That being said, if you're flexible with your travel plans, it's possible to score a cheap fare just before your departure.
Is it cheaper to book a GEG to ISP flight and hotel package?
Securing a GEG to ISP flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of accommodations and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Spokane Intl. Airport (GEG) to MacArthur Airport (ISP)?
Generally, it's possible to cancel or reschedule your GEG to ISP flight. However, for bookings made more than 24 hours ago, additional fees 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 details on our Customer Service portal.

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*Available to One Key members.