In terms of precipitation, rainfall in Des Moines ranges from 1.0 - 4.9 inches per month. June is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Des Moines when rainfall is around 1.0 in.

If weather is an important factor for your trip to Des Moines, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

How far in advance should I book a flight from Islip, New York to Des Moines?

Travelers have found it’s best to book a flight 47 days in advance to save up to 234% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 47 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Islip, New York to Des Moines 1-2 weeks in advance for as low as $312, or $388 for flights within the next 24 hours.

What is the cheapest month to fly from Islip, New York to Des Moines?

Flights from Islip, New York to Des Moines lean towards being more expensive in December. Prices are generally better when you fly from Islip, New York to Des Moines in September, with the cheapest ticket starting at $92.

What is the cheapest time of day to fly from ISP to DSM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip, New York to Des Moines as you normally would.

Can I find deals for flights from Islip to Des Moines that include hotel bookings?

Yes. In addition to deals on Islip to Des Moines flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Islip to Des Moines?

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

Can I find deals for business class flights from Islip to Des Moines?

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

$607+ Flights from Islip, NY to Des Moines

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Cheap flight deals from Islip to Des Moines

Round-trip from	$607 (Southwest)
Popular in	December
Cheapest in	September
Average price	$358

From Islip Long Island to Des Moines

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find flight deals from Islip to Des Moines

Cheapest flights from Islip to Des Moines
Explore the most affordable flight options available from Islip to Des Moines. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

dom. 10/512:55 pmISP - DSM

2 stops11h 50mSouthwest

mié. 10/86:20 amDSM - ISP

2 stops8h 45mSouthwest

Deal found 7/29

$607

Best flights from Islip to Des Moines
Discover carefully curated flight deals from Islip to Des Moines that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 30, 2025.

dom. 10/512:55 pmISP - DSM

2 stops11h 50mSouthwest

mié. 10/86:20 amDSM - ISP

2 stops8h 45mSouthwest

Deal found 7/29

$607

Fly from

Fly to

Route

Depart

Return

Price

IslipDes Moines

ISP - DSM

ISPDSM

Islip Long Island

dom. 10/5

12:55 pm-11:45 pm

2 stops11h 50m

Des Moines

mié. 10/8

6:20 am-4:05 pm

2 stops8h 45m

$607

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Islip to Des Moines

Have a flexible travel schedule? Discover the best time to fly to Des Moines from Islip with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Des Moines

What is the cheapest month to book a flight from Islip, New York to Des Moines?

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Des Moines (average of $336). Flying from Islip, New York to Des Moines in June is currently the most expensive (average of $402). 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.

Reviews of airlines servicing Des Moines

See what other customers who have flown with Southwest from Islip to Des Moines have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,241 reviews

Southwest

8.0

Very good

4,241 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

Can I find deals for flights from Islip to Des Moines that include hotel bookings?
Yes. In addition to deals on Islip to Des Moines flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Des Moines?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Des Moines.
Can I find deals for business class flights from Islip to Des Moines?
Yes. Cheapflights offers flight deals from Islip to Des Moines by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Islip, New York to Des Moines?
Currently, August is the cheapest month in which you can book a flight from Islip, New York to Des Moines (average of $336). Flying from Islip, New York to Des Moines in June is currently the most expensive (average of $402). 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.

See more FAQs

Altoona

Ames

Johnston

Boone

West Des Moines

Ankeny

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$607+ Cheap flights from Islip, NY to Des Moines (ISP - DSM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Des Moines with Cheapflights

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2. Select your favorite providers

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Cheap flight deals from Islip to Des Moines

Round-trip from

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Find flight deals from Islip to Des Moines

Cheapest flights from Islip to Des MoinesExplore the most affordable flight options available from Islip to Des Moines. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

Explore the most affordable flight options available from Islip to Des Moines. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Des Moines that are best for you.

Best time to book a flight from Islip to Des Moines

Have a flexible travel schedule? Discover the best time to fly to Des Moines from Islip with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Islip to Des Moines

What is the cheapest month to book a flight from Islip, New York to Des Moines?

Reviews of airlines servicing Des Moines

See what other customers who have flown with Southwest from Islip to Des Moines have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Islip to Des Moines. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Islip to Des Moines that include hotel bookings?

How can I find direct flights from Islip to Des Moines?

Can I find deals for business class flights from Islip to Des Moines?

What is the cheapest month to book a flight from Islip, New York to Des Moines?

Traveling to a place near Des Moines?

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Alternative routes for Islip to Des Moines

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Cheapest flights from Islip to Des Moines
Explore the most affordable flight options available from Islip to Des Moines. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.