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Cheap flights from Islip, New York to San Jose from $453

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, New York to San Jose departing on 3/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to San Jose

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
1:35 pm - 10:50 pmISP-SJC
12h 15m2 stops
Southwest Logo
8:00 am - 11:55 pmSJC-ISP
12h 55m2 stops
$680Southwest
Find Deal
Fri, Dec 19 - Sun, Dec 28
Southwest Logo
6:00 am - 8:55 pmISP-SJC
17h 55m2 stops
Southwest Logo
6:35 am - 8:50 pmSJC-ISP
11h 15m2 stops
$703Southwest
Find Deal
Sat, Dec 20 - Sat, Dec 27
Southwest Logo
12:40 pm - 8:55 pmISP-SJC
11h 15m2 stops
Southwest Logo
8:00 am - 10:05 pmSJC-ISP
11h 05m2 stops
$774Southwest
Find Deal
Mon, Dec 1 - Thu, Dec 4

Southwest flights from Islip, New York to San Jose, California

Our best Southwest deals on Islip, New York to San Jose, California flight tickets
Southwest
Dec 19
ISP1:35 pmIslip Long Island
12h 15m
2 stops
SJC10:50 pmSan Jose
Dec 28
SJC8:00 amSan Jose
12h 55m
2 stops
ISP11:55 pmIslip Long Island
$680
Find similar
Southwest
Dec 20
ISP6:00 amIslip Long Island
17h 55m
2 stops
SJC8:55 pmSan Jose
Dec 27
SJC6:35 amSan Jose
11h 15m
2 stops
ISP8:50 pmIslip Long Island
$703
Find similar
Southwest
Dec 1
ISP12:40 pmIslip Long Island
11h 15m
2 stops
SJC8:55 pmSan Jose
Dec 4
SJC8:00 amSan Jose
11h 05m
2 stops
ISP10:05 pmIslip Long Island
$774
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to San Jose, California 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 October 23, 2025.
Use the filters below to find and compare flights from Islip, New York to San Jose, California that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Fri 12/19

1:35 pm-10:50 pm

2 stops12h 15m

San Jose

Sun 12/28

8:00 am-11:55 pm

2 stops12h 55m

$680

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sat 12/20

6:00 am-8:55 pm

2 stops17h 55m

San Jose

Sat 12/27

6:35 am-8:50 pm

2 stops11h 15m

$703

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Mon 12/1

12:40 pm-8:55 pm

2 stops11h 15m

San Jose

Thu 12/4

8:00 am-10:05 pm

2 stops11h 05m

$774

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Mon 3/2

7:30 am-4:44 pm

2 stops12h 14m

$453

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sun 3/1

7:30 am-4:44 pm

2 stops12h 14m

$493

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Tue 3/31

7:30 am-4:45 pm

2 stops12h 15m

$552

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to San Jose from

How to get the cheapest flight ticket from Islip, New York to San Jose, California

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, California?

On average, the least expensive day to fly to San Jose, California from Islip, New York is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $521. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Islip, New York to San Jose, California for around $796.

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

The cheapest time of day to fly to San Jose, California is in the evening when flights can be purchased for as low as $356. In the afternoon is when there is more demand to fly to San Jose, California, so prices are often more expensive at around $616 per ticket.

Can stopping save me money on Islip, New York to San Jose, California flights?

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

When to book flights from Islip, New York to San Jose, California

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

Cheap Islip, New York to San Jose, California (ISP to SJC) flight deals and tips

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

Direct flights

None
There are no direct flights from Islip, New York to San Jose, California. There are no popular flight routes from Islip, New York to San Jose, California.
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  • 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 11h 15m.

  • 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.

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