Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Islip to San Jose from $291

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to San Jose departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Islip to San Jose

Cheap round-trip flights

Southwest Logo
12:35 pm - 8:15 pmISP-SJC
10h 40m2 stops
Southwest Logo
8:55 pm - 12:10 pmSJC-ISP
12h 15m1 stop
$545Southwest
Find Deal
Mon, Oct 27 - Fri, Oct 31
Southwest Logo
12:35 pm - 8:15 pmISP-SJC
10h 40m2 stops
Southwest Logo
7:30 am - 9:10 pmSJC-ISP
10h 40m2 stops
$573Southwest
Find Deal
Mon, Oct 27 - Fri, Oct 31

Southwest flights from Islip to San Jose

Our best Southwest deals on Islip to San Jose flight tickets
Southwest
Oct 27
ISP12:35 pmIslip Long Island
10h 40m
2 stops
SJC8:15 pmSan Jose
Oct 31
SJC8:55 pmSan Jose
12h 15m
1 stop
ISP12:10 pmIslip Long Island
$545
Find similar
Southwest
Oct 27
ISP12:35 pmIslip Long Island
10h 40m
2 stops
SJC8:15 pmSan Jose
Oct 31
SJC7:30 amSan Jose
10h 40m
2 stops
ISP9:10 pmIslip Long Island
$573
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip to San Jose that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Islip to San Jose that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Mon 10/27

12:35 pm-8:15 pm

2 stops10h 40m

San Jose

Fri 10/31

8:55 pm-12:10 pm

1 stop12h 15m

$545

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Mon 10/27

12:35 pm-8:15 pm

2 stops10h 40m

San Jose

Fri 10/31

7:30 am-9:10 pm

2 stops10h 40m

$573

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Wed 10/15

8:21 pm-5:47 pm

3 stops48h 26m

$291

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Tue 10/14

11:40 am-6:05 pm

1 stop9h 25m

$300

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sun 10/12

2:19 pm-5:48 pm

3 stops30h 29m

$320

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Tue 10/14

11:40 am-10:10 pm

2 stops13h 30m

$344

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Thu 10/16

2:19 pm-5:47 pm

3 stops30h 28m

$349

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sun 10/12

7:36 pm-5:48 pm

2 stops25h 12m

$407

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Tue 10/14

9:37 pm-10:13 am

3 stops39h 36m

$419

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Thu 10/16

7:36 pm-5:47 pm

2 stops25h 11m

$422

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to San Jose from

How to get the cheapest flight ticket from Islip to San Jose

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to San Jose?

The cheapest day to depart on your flight to San Jose is on a Tuesday when prices can be found for as low as $521. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Jose on Sunday is $796.

What is the cheapest time of day to depart on your flight to San Jose?

Our most recent data shows that the best time of day to fly to San Jose is in the evening. Flights from Islip to San Jose during this time can be as low as $356. In contrast, the most expensive time of day to depart to San Jose is in the afternoon when prices are around $616.

Can stopping save me money on Islip to San Jose flights?

You could potentially save up to 43% on your flight if you consider stops on a Islip to San Jose flight.

When to book flights from Islip to San Jose

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to San Jose according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip to San Jose (ISP to SJC) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to San Jose

Direct flights

None
There are no direct flights from Islip to San Jose. There are no popular flight routes from Islip to San Jose.
Search flight deals

  • How far is Islip Long Island to San Jose by plane?

    The distance between Islip Long Island and San Jose is about 2587.7 mi. A reasonable flight in good conditions will take 10h 40m.

  • When did momondo last update prices for flights from Islip Long Island Airport to San Jose Airport?

    Prices for flights from Islip Long Island Airport to San Jose Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to San Jose Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to San Jose Airport.

  • What documentation or ID do you need to fly to San Jose Airport?

    The required travel and health documents for your San Jose Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Jose Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Islip to San Jose?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Islip to San Jose. momondo saves you time and could save you money on your trip.

Can I find flights from Islip to San Jose with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Jose from Islip which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Islip to San Jose?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to San Jose.

I’m not ready to book a flight from Islip to San Jose right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Islip to San Jose now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Jose and let you know when they change.

An easier way to manage your San Jose trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 10/16
Thu 10/23
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States