San Diego

$71+ Cheap flights from O'Hare Intl (ORD) to San Diego (SAN)

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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SAN
Aug 19 — Aug 261
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Cheapflights Tip: The best prices from Chicago O'Hare Intl to San Diego are usually found in August or July, booked 71 days in advance, depart on a Friday or Saturday and return on a Thursday

Cheap flight deals from O'Hare Intl to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$147
(Expedia)

One-way from

$71
(Cheapflightsfares)

Popular in

March

Cheapest in

August

Average price

$259

Good round-trip deal

$191 or less

Good one-way deal

$128 or less
From Chicago O'Hare Intl to San Diego
One-way flight from Chicago O'Hare Intl to San Diego
Highest demand for flights based on searches. 17% potential increase in price ($80 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from Chicago O'Hare Intl to San Diego.
Price to beat on a one-way flight from Chicago O'Hare Intl to San Diego.

Find flight deals from O'Hare Intl to San Diego

Cheapest flights from O'Hare Intl to San Diego
Explore the most affordable flight options available from O'Hare Intl to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Frontier deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/197:15 amORD - SAN
Nonstop4h 22mFrontier
Fri 10/244:06 pmSAN - ORD
Nonstop4h 18mFrontier
Deal found 8/14$148
This CheapOair deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amORD - SAN
1 stop16h 07mFrontier
Sun 9/146:35 amSAN - ORD
1 stop15h 24mFrontier
Deal found 8/13$150
This Booking.com deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:42 amORD - SAN
1 stop26h 27mFrontier
Wed 10/86:41 amSAN - ORD
1 stop15h 12mFrontier
Deal found 8/14$151
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/237:35 amORD - SAN
Nonstop4h 22mMultiple Airlines
Tue 11/48:00 amSAN - ORD
Nonstop3h 54mMultiple Airlines
Deal found 8/11$152
This Kiwi.com deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2012:46 pmORD - SAN
1 stop7h 56mSpirit Airlines
Wed 9/241:35 pmSAN - ORD
1 stop5h 57mSpirit Airlines
Deal found 8/11$153
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:00 amORD - SAN
Nonstop4h 18mAmerican Airlines
Sat 9/136:15 amSAN - ORD
Nonstop4h 27mAmerican Airlines
Deal found 8/11$154
This Trip.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/153:50 pmORD - SAN
Nonstop5h 00mMultiple Airlines
Sun 10/194:26 pmSAN - ORD
Nonstop4h 18mMultiple Airlines
Deal found 8/12$155
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:35 amORD - SAN
Nonstop4h 22mFrontier
Fri 10/104:26 pmSAN - ORD
Nonstop4h 18mFrontier
Deal found 8/12$156
This Kiwi.com deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/97:35 amORD - SAN
Nonstop4h 22mMultiple Airlines
Wed 10/2912:45 pmSAN - ORD
Nonstop4h 14mMultiple Airlines
Deal found 8/12$157
This Orbitz deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:55 amORD - SAN
Nonstop4h 35mMultiple Airlines
Sun 9/77:47 pmSAN - ORD
1 stop14h 04mMultiple Airlines
Deal found 8/12$158
This Alaska Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/83:50 pmORD - SAN
Nonstop5h 00mAlaska Airlines
Fri 10/315:49 pmSAN - ORD
Nonstop4h 10mAlaska Airlines
Deal found 8/12$159
This FlightHub deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/37:20 amORD - SAN
1 stop16h 48mMultiple Airlines
Wed 9/101:35 pmSAN - ORD
1 stop5h 57mMultiple Airlines
Deal found 8/13$160

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl to San Diego 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, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to San Diego that are best for you.

Fly from

O'Hare Intl

Fly to

San Diego

Route

Depart

Return

Price

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 9/11

6:00 am-8:07 pm

1 stop16h 07m

San Diego

Tue 9/16

7:15 am-9:28 pm

1 stop12h 13m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 9/10

7:09 pm-11:48 am

2 stops18h 39m

San Diego

Wed 9/17

1:35 pm-9:32 pm

1 stop5h 57m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 10/2

10:42 am-8:07 pm

1 stop11h 25m

San Diego

Sun 10/5

9:03 pm-9:37 am

1 stop10h 34m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 10/15

7:15 am-11:50 pm

1 stop18h 35m

San Diego

Wed 10/22

6:41 am-11:53 pm

1 stop15h 12m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 10/9

4:44 pm-8:08 pm

1 stop29h 24m

San Diego

Sat 10/18

7:00 am-11:53 pm

1 stop14h 53m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 10/4

8:25 am-11:09 am

1 stop28h 44m

San Diego

Wed 10/8

6:41 am-11:53 pm

1 stop15h 12m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 10/14

7:15 am-11:50 pm

1 stop18h 35m

San Diego

Sat 10/18

4:06 pm-10:24 pm

Nonstop4h 18m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 9/10

7:20 am-10:24 pm

1 stop17h 04m

San Diego

Mon 9/15

10:20 am-11:59 pm

1 stop11h 39m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sun 10/5

10:42 am-11:53 pm

1 stop15h 11m

San Diego

Thu 10/16

6:41 am-11:53 pm

1 stop15h 12m

$150

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 10/23

6:50 am-11:50 pm

1 stop19h 00m

San Diego

Wed 10/29

6:41 am-12:12 am

1 stop15h 31m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 21 results
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The best insider tips for Chicago O'Hare Intl Airport to San Diego flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Chicago O'Hare Intl Airport to San Diego trip
Airports
ORD

For a quick departure, take the "L" train to ORD, avoiding Chicago traffic delays common with taxis or rideshares.

Read more about ORDby Ramsey Qubein
SAN

Upon arrival at SAN, use the free San Diego Flyer shuttle to connect to the Old Town Transit Center for easy downtown access.

Read more about SANby Blane Bachelor
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on ORD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

Best time to book a flight from O'Hare Intl to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from O'Hare Intl 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 Chicago O'Hare Intl Airport to San Diego

How far ahead should I book a flight from Chicago O'Hare Intl Airport to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to San Diego. Price data was last updated on August 8, 2025.

The price you pay for your flight from Chicago O'Hare Intl Airport to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 71 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to San Diego?

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Diego (average of $286). Flying from Chicago O'Hare Intl Airport to San Diego in March is currently the most expensive (average of $366). 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 ORD to SAN?

Find hourly flight availability from O'Hare Intl to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s optimal to fly from Chicago O'Hare Intl Airport to San Diego at noon. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to San Diego?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to San Diego. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to San Diego flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago O'Hare Intl Airport to San Diego

Explore weekly flight availability from O'Hare Intl to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2025.

The most flights from ORD to SAN are scheduled on a Thursday (46 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 on average).

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated August 14, 2025.
See what other customers who have flown with Alaska Airlines, United Airlines, and American Airlines from Chicago O'Hare Intl Airport to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

BOI - LAX

flying in first class, my husband froze the entire flight and was miserable. first class does not offer blankets or any entertainment. (TV etc)

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to San Diego. 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 Diego from Chicago O'Hare Intl?

    San Diego (SAN) is the airport you will fly into if you book a flight from Chicago O'Hare Intl to San Diego. You should not have trouble finding flights to San Diego from Chicago O'Hare Intl; the airport handles an average of 33 inbound flights from Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 8 airlines have flights to the San Diego airport from Chicago O'Hare Intl. It is only a 2.6 mi journey from San Diego (SAN) to San Diego’s city center.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to San Diego round-trip?

    According to our current data, Spirit Airlines ($99), Frontier ($122), and Hawaiian Airlines ($138) offers the cheapest pricing from Chicago O'Hare Intl Airport to San Diego. These flights start at 74% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to San Diego?

    The top 3 most reliable airlines when flying from Chicago O'Hare Intl Airport to San Diego are United Airlines (84%), Japan Airlines (78%) and Air Canada (78%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to San Diego?

    Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Chicago O'Hare Intl - San Diego) can be booked for $79 on average our data indicates $671 when flying from Chicago O'Hare Intl Airport to San Diego.

  • Can I find deals for flights from O'Hare Intl to San Diego that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to San Diego.

  • Can I find deals for business class flights from O'Hare Intl to San Diego?

    Yes. Cheapflights offers flight deals from O'Hare Intl to San Diego 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 Chicago O'Hare Intl Airport to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to San Diego (average of $286). Flying from Chicago O'Hare Intl Airport to San Diego in March is currently the most expensive (average of $366). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
National City
Lemon Grove
Imperial Beach
Alpine

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Top 8 airlines flying from O'Hare Intl to San Diego

Discover the top 8 airlines that operate flights from O'Hare Intl to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$99Average$205FlexibilityNo cancel feeOn-time65%
FrontierCheapest$122Average$207FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$138Average$367FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$143Average$452FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$176Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$240Average$337FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$477FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$296Average$501FlexibilityNo cancel feeOn-time63%

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