What are the cheapest airlines to fly from Illinois to San Jose one-way?

The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $112. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from Illinois to San Jose for a low price.

What are the most popular routes from Illinois to San Jose?

The most popular flight routes from Illinois to San Jose are Chicago O'Hare Intl - San Jose, Chicago Midway - San Jose and Lambert-St Louis - San Jose.

What are the cheapest flights from Illinois to San Jose?

On average you can expect to pay $466 for a flight from Illinois to San Jose. The cheapest flight overall is $169 while the most popular route, (Chicago O'Hare Intl - San Jose) is currently priced at $170.

What are the most popular airlines that fly from Illinois to San Jose?

The most popular airlines flying from Illinois to San Jose are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

How far in advance should I book a flight from Illinois to San Jose?

Travelers have found it’s best to book a flight 59 days in advance to save up to 110% 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 59 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 Illinois to San Jose 1-2 weeks in advance for as low as $297, or $394 for flights within the next 24 hours.

What is the cheapest month to fly from Illinois to San Jose?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, October can be a great choice for travel to San Jose. Flights to San Jose from Illinois in October are about $407 on average during October, but can be found for as low as $143.

What airport do you fly into for flights to San Jose from Illinois?

For a flight from Illinois to San Jose, you will be flying into San Jose. San Jose (SJC) is just 2.9 mi from the center of the city.

Can I find deals for flights from Illinois to San Jose that include hotel bookings?

Yes. In addition to deals on Illinois to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to San Jose?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to San Jose.

Can I find deals for business class flights from Illinois to San Jose?

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

$112+ Flights from Illinois to San Jose

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Cheap flight deals from Illinois to San Jose

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$174 (Mytrip)
One-way from	$112 (Mytrip)
Popular in	March
Cheapest in	October
Average price	$483
Good round-trip deal	$417 or less
Good one-way deal	$181 or less

Provider with most accurate pricing for Chicago (CHI)-San Jose flight deals.

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Provider most trusted by Cheapflights users for Chicago (CHI)-San Jose flights.

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From Illinois to San Jose

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One-way flight from Illinois to San Jose

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

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Price to beat on a round-trip flight from Illinois to San Jose.

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Price to beat on a one-way flight from Illinois to San Jose.

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Find flight deals from Illinois to San Jose

Cheapest flights from Illinois to San Jose
Explore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Mon 4/283:08 pmORD - SJC

1 stop24h 47mSpirit Airlines

Thu 5/12:50 pmSJC - ORD

1 stop13h 43mSpirit Airlines

Deal found 3/26

$174

Sun 4/67:39 pmORD - SJC

1 stop25h 43mMultiple Airlines

Wed 4/307:54 pmSJC - ORD

1 stop8h 39mMultiple Airlines

Deal found 3/26

$219

Wed 4/237:04 amSTL - SJC

1 stop8h 25mAmerican Airlines

Wed 4/302:19 pmSJC - STL

1 stop6h 09mAmerican Airlines

Deal found 3/25

$227

Thu 4/178:50 pmMDW - SJC

1 stop24h 32mFrontier

Sun 4/208:59 pmSJC - MDW

1 stop6h 21mFrontier

Deal found 3/27

$240

Mon 4/217:15 pmSTL - SJC

1 stop6h 39mDelta

Sat 4/266:15 amSJC - STL

1 stop8h 31mDelta

Deal found 3/26

$257

Wed 4/96:40 amORD - SJC

1 stop10h 19mFrontier

Sun 4/138:59 pmSJC - ORD

1 stop5h 55mFrontier

Deal found 3/27

$270

Mon 4/76:38 pmSTL - SJC

1 stop26h 00mFrontier

Thu 4/108:59 pmSJC - STL

1 stop18h 44mFrontier

Deal found 3/27

$270

Mon 6/165:45 amSTL - SJC

2 stops7h 45mSouthwest

Wed 6/251:00 pmSJC - STL

1 stop6h 45mSouthwest

Deal found 3/26

$287

Wed 4/236:00 amORD - SJC

1 stop8h 01mAlaska Airlines

Wed 4/308:24 amSJC - ORD

1 stop11h 35mAlaska Airlines

Deal found 3/26

$294

Tue 5/272:25 pmORD - SJC

1 stop9h 41mDelta

Sat 5/3111:44 amSJC - ORD

1 stop10h 15mDelta

Deal found 3/26

$305

Fri 4/116:33 amPIA - SJC

1 stop6h 51mAmerican Airlines

Tue 4/159:47 amSJC - PIA

2 stops12h 09mAmerican Airlines

Deal found 3/27

$344

Sat 5/39:00 amORD - SJC

1 stop7h 46mHawaiian Airlines

Sun 5/1110:14 amSJC - ORD

1 stop9h 45mHawaiian Airlines

Deal found 3/27

$346

Best flights from Illinois to San Jose
Discover carefully curated flight deals from Illinois to San Jose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Mon 5/129:02 pmORD - SJC

1 stop15h 03mSpirit Airlines

Tue 5/204:28 pmSJC - ORD

1 stop16h 27mSpirit Airlines

Deal found 3/27

$174

Mon 5/129:02 pmORD - SJC

1 stop14h 58mMultiple Airlines

Mon 5/1912:20 pmSJC - ORD

1 stop9h 21mMultiple Airlines

Deal found 3/28

$200

Wed 4/237:04 amSTL - SJC

1 stop8h 25mAmerican Airlines

Wed 4/302:19 pmSJC - STL

1 stop6h 09mAmerican Airlines

Deal found 3/25

$227

Fri 4/186:40 amORD - SJC

1 stop10h 19mFrontier

Mon 4/218:12 pmSJC - ORD

1 stop6h 56mFrontier

Deal found 3/28

$238

Mon 4/217:15 pmSTL - SJC

1 stop6h 39mDelta

Sat 4/266:15 amSJC - STL

1 stop8h 31mDelta

Deal found 3/26

$257

Mon 6/165:45 amSTL - SJC

2 stops7h 45mSouthwest

Wed 6/251:00 pmSJC - STL

1 stop6h 45mSouthwest

Deal found 3/26

$287

Wed 4/236:00 amORD - SJC

1 stop8h 01mHawaiian Airlines

Wed 4/3010:14 amSJC - ORD

1 stop9h 45mHawaiian Airlines

Deal found 3/27

$294

Wed 4/309:00 amORD - SJC

1 stop9h 58mAlaska Airlines

Fri 5/28:59 pmSJC - ORD

1 stop18h 01mAlaska Airlines

Deal found 3/27

$304

Fri 5/27:55 pmORD - SJC

Nonstop4h 59mUnited Airlines

Mon 5/56:20 amSJC - ORD

Nonstop4h 23mUnited Airlines

Deal found 3/27

$376

Thu 4/178:50 pmMDW - SJC

1 stop24h 32mFrontier

Sun 4/208:59 pmSJC - MDW

1 stop6h 21mFrontier

Deal found 3/27

$240

Mon 4/76:38 pmSTL - SJC

1 stop26h 00mFrontier

Thu 4/108:59 pmSJC - STL

1 stop18h 44mFrontier

Deal found 3/27

$270

Sat 4/265:10 pmORD - SJC

1 stop7h 01mDelta

Tue 4/296:29 amSJC - ORD

1 stop15h 30mDelta

Deal found 3/27

$327

Last-minute flights from Illinois to San Jose
Discover last-minute flight deals from Illinois to San Jose. Data last updated March 28, 2025 and is based on user searches.

Tue 4/13:40 pmSTL - SJC

1 stop9h 11mUnited Airlines

Wed 4/28:30 amSJC - STL

2 stops12h 45mUnited Airlines

Deal found 3/27

$474

Wed 4/28:09 amORD - SJC

1 stop12h 50mMultiple Airlines

Sun 4/68:59 pmSJC - ORD

1 stop5h 55mMultiple Airlines

Deal found 3/26

$329

Wed 4/22:05 pmORD - SJC

2 stops10h 54mAlaska Airlines

Sun 4/69:00 pmSJC - ORD

2 stops18h 55mAlaska Airlines

Deal found 3/26

$653

Wed 4/25:10 amSTL - SJC

1 stop8h 25mAlaska Airlines

Wed 4/23:00 pmSJC - STL

1 stop6h 59mAlaska Airlines

Deal found 3/27

$673

Thu 4/311:15 amSTL - SJC

1 stop7h 20mSouthwest

Sun 4/65:40 pmSJC - STL

1 stop5h 10mSouthwest

Deal found 3/27

$374

Fri 4/46:40 amORD - SJC

1 stop10h 19mFrontier

Thu 4/108:59 pmSJC - ORD

1 stop5h 55mFrontier

Deal found 3/27

$278

Fri 4/46:38 pmSTL - SJC

1 stop18h 35mFrontier

Sun 4/68:59 pmSJC - STL

1 stop18h 44mFrontier

Deal found 3/27

$350

Fri 4/45:50 amMLI - SJC

1 stop7h 49mDelta

Sun 4/66:15 amSJC - MLI

1 stop8h 05mDelta

Deal found 3/27

$419

Fri 4/41:00 pmSTL - SJC

3 stops31h 59mMultiple Airlines

Sun 4/68:08 pmSJC - STL

3 stops22h 02mMultiple Airlines

Deal found 3/27

$658

Sat 4/56:45 amMDW - SJC

1 stop8h 55mFrontier

Mon 4/78:12 pmSJC - MDW

1 stop7h 11mFrontier

Deal found 3/27

$280

Sun 4/68:00 amORD - SJC

2 stops34h 54mSpirit Airlines

Tue 4/88:50 pmSJC - ORD

1 stop15h 13mSpirit Airlines

Deal found 3/26

$265

Sun 4/67:40 amSTL - SJC

1 stop6h 36mDelta

Sat 4/126:15 amSJC - STL

1 stop7h 51mDelta

Deal found 3/27

$343

One-way flights from Illinois to San Jose
Search for one-way flight options from Illinois to San Jose. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Mon 5/53:08 pmORD - SJC

1 stop24h 47mSpirit Airlines

Deal found 3/27

$112

Sat 4/196:45 amMDW - SJC

1 stop9h 05mFrontier

Deal found 3/27

$119

Sat 4/196:45 amORD - SJC

1 stop9h 05mFrontier

Deal found 3/27

$119

Tue 5/67:45 amSTL - SJC

1 stop6h 05mSouthwest

Deal found 3/26

$124

Wed 5/215:15 pmMLI - SJC

1 stop7h 45mDelta

Deal found 3/27

$129

Tue 4/293:44 pmSTL - SJC

2 stops9h 03mAmerican Airlines

Deal found 3/27

$129

Sun 4/279:55 pmSTL - SJC

1 stop18h 05mFrontier

Deal found 3/27

$146

Tue 4/299:00 amORD - SJC

1 stop7h 46mAlaska Airlines

Deal found 3/27

$147

Wed 5/282:25 pmORD - SJC

1 stop9h 41mDelta

Deal found 3/27

$148

Thu 5/16:10 pmSTL - SJC

3 stops25h 30mSpirit Airlines

Deal found 3/27

$150

Wed 5/77:30 amSTL - SJC

2 stops11h 58mDelta

Deal found 3/27

$157

Thu 5/228:20 pmMDW - SJC

2 stops20h 11mMultiple Airlines

Deal found 3/26

$159

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to San Jose that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Mon 4/28

3:08 pm-1:55 pm

1 stop24h 47m

San Jose

Thu 5/1

2:50 pm-6:33 am

1 stop13h 43m

$174

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Sun 4/6

7:39 pm-7:22 pm

1 stop25h 43m

San Jose

Wed 4/30

7:54 pm-6:33 am

1 stop8h 39m

$219

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Wed 4/23

7:04 am-1:29 pm

1 stop8h 25m

San Jose

Wed 4/30

2:19 pm-10:28 pm

1 stop6h 09m

$227

ChicagoSan Jose

MDW - SJC

MDWSJC

Chicago Midway

Thu 4/17

8:50 pm-7:22 pm

1 stop24h 32m

San Jose

Sun 4/20

8:59 pm-5:20 am

1 stop6h 21m

$240

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Mon 4/21

7:15 pm-11:54 pm

1 stop6h 39m

San Jose

Tue 4/22

6:15 am-3:06 pm

1 stop6h 51m

$257

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Wed 4/9

6:40 am-2:59 pm

1 stop10h 19m

San Jose

Sun 4/13

8:59 pm-4:54 am

1 stop5h 55m

$270

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Mon 4/7

6:38 pm-6:38 pm

1 stop26h 00m

San Jose

Thu 4/10

8:59 pm-5:43 pm

1 stop18h 44m

$270

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Mon 6/16

5:45 am-11:30 am

2 stops7h 45m

San Jose

Wed 6/25

1:00 pm-9:45 pm

1 stop6h 45m

$287

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Wed 4/23

6:00 am-12:01 pm

1 stop8h 01m

San Jose

Wed 4/30

8:24 am-9:59 pm

1 stop11h 35m

$294

ChicagoSan Jose

ORD - SJC

ORDSJC

Chicago O'Hare Intl

Tue 5/27

2:25 pm-10:06 pm

1 stop9h 41m

San Jose

Sat 5/31

11:44 am-11:59 pm

1 stop10h 15m

$305

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 50 results

...

Best time to book a flight from Illinois to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose from Illinois 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 Illinois to San Jose

What is the cheapest month to book a flight from Illinois to San Jose?

Currently, September is the cheapest month in which you can book a flight from Illinois to San Jose (average of $255). Flying from Illinois to San Jose in June is currently the most expensive (average of $363). 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.

What is the cheapest time of day to fly from IL to SJC?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Jose as you normally would.

Rainfall in San Jose by month

In terms of precipitation, rainfall in San Jose ranges from 0.0 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. July is typically the driest time to visit San Jose when rainfall is around 0.0 in.

Temperature in San Jose by month

If weather is an important factor for your trip to San Jose, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing San Jose

Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Illinois to San Jose. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest

8.1

Very good

4,273 reviews

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines

8.0

Very good

9,798 reviews

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta

8.0

Very good

7,896 reviews

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Hawaiian Airlines

7.9

Good

2,336 reviews

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines

7.4

Good

8,603 reviews

Southwest

8.1

Very good

4,273 reviews

Reviews

1 / 20

10.0

Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

What airport do you fly into for flights to San Jose from Illinois?
For a flight from Illinois to San Jose, you will be flying into San Jose. San Jose (SJC) is just 2.9 mi from the center of the city.
What are the cheapest airlines to fly from Illinois to San Jose one-way?
The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $112. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from Illinois to San Jose for a low price.
What are the most popular routes from Illinois to San Jose?
The most popular flight routes from Illinois to San Jose are Chicago O'Hare Intl - San Jose, Chicago Midway - San Jose and Lambert-St Louis - San Jose.
What are the cheapest flights from Illinois to San Jose?
On average you can expect to pay $466 for a flight from Illinois to San Jose. The cheapest flight overall is $169 while the most popular route, (Chicago O'Hare Intl - San Jose) is currently priced at $170.
Can I find deals for flights from Illinois to San Jose that include hotel bookings?
Yes. In addition to deals on Illinois to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to San Jose?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to San Jose.
Can I find deals for business class flights from Illinois to San Jose?
Yes. Cheapflights offers flight deals from Illinois to San Jose 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 Illinois to San Jose?
Currently, September is the cheapest month in which you can book a flight from Illinois to San Jose (average of $255). Flying from Illinois to San Jose in June is currently the most expensive (average of $363). 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

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Illinois to San Jose

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$90	Average$223	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$133	Average$246	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$140	Average$357	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$258	Average$366	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$296	Average$534	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$307	Average$503	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$353	Average$479	FlexibilityNo cancel fee	On-time63%

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$112+ Cheap flights from Illinois to San Jose (SJC)

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

Find cheap flights from Illinois to San Jose with Cheapflights

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Cheap flight deals from Illinois to San Jose

Keep the following information in mind while searching for Illinois to San Jose flight deals. Data was last updated March 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to San Jose

Cheapest flights from Illinois to San JoseExplore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Explore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to San Jose that are best for you.

Best time to book a flight from Illinois to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to San Jose

What is the cheapest month to book a flight from Illinois to San Jose?

What is the cheapest time of day to fly from IL to SJC?

Find hourly flight availability from Illinois to San Jose. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Rainfall in San Jose by month

Plan your trip to San Jose by taking into account the average rainfall totals by month.

Temperature in San Jose by month

Plan your trip to San Jose by taking into account the average temperature totals by month.

Reviews of airlines servicing San Jose

Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Illinois to San Jose. In addition to providing an overall rating, users have also rated airlines 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 Illinois to San Jose. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to San Jose from Illinois?

What are the cheapest airlines to fly from Illinois to San Jose one-way?

What are the most popular routes from Illinois to San Jose?

What are the cheapest flights from Illinois to San Jose?

Can I find deals for flights from Illinois to San Jose that include hotel bookings?

How can I find direct flights from Illinois to San Jose?

Can I find deals for business class flights from Illinois to San Jose?

What is the cheapest month to book a flight from Illinois to San Jose?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to San Jose

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Illinois to San Jose

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Cheapest flights from Illinois to San Jose
Explore the most affordable flight options available from Illinois to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.