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Cheap flights from Chicago O'Hare Intl Airport to San Diego from $74

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to San Diego departing on 10/18. 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 Chicago O'Hare Intl Airport to San Diego

Cheap round-trip flights

Alaska Airlines Logo
3:50 pm - 6:50 pmORD-SAN
5h 00mnonstop
Alaska Airlines Logo
12:45 pm - 6:59 pmSAN-ORD
4h 14mnonstop
$133Alaska Airlines
Find Deal
Thu, Oct 23 - Tue, Oct 28
Alaska Airlines Logo
2:54 pm - 5:19 pmORD-SAN
4h 25mnonstop
Alaska Airlines Logo
5:49 pm - 11:59 pmSAN-ORD
4h 10mnonstop
$139Alaska Airlines
Find Deal
Wed, Oct 29 - Tue, Nov 11
United Airlines Logo
7:10 am - 9:39 amORD-SAN
4h 29mnonstop
United Airlines Logo
10:30 pm - 4:34 amSAN-ORD
4h 04mnonstop
$143United Airlines
Find Deal
Fri, Nov 14 - Wed, Nov 19
Hawaiian Airlines Logo
10:00 am - 1:00 pmORD-SAN
5h 00mnonstop
Hawaiian Airlines Logo
8:10 am - 2:50 pmSAN-ORD
4h 40mnonstop
$144Hawaiian Airlines
Find Deal
Sat, Oct 18 - Sat, Oct 25
Hawaiian Airlines Logo
10:00 am - 1:00 pmORD-SAN
5h 00mnonstop
Hawaiian Airlines Logo
8:10 am - 2:50 pmSAN-ORD
4h 40mnonstop
$146Hawaiian Airlines
Find Deal
Sat, Oct 18 - Sat, Oct 25
Southwest Logo
6:55 pm - 11:20 pmORD-SAN
6h 25m1 stop
Southwest Logo
6:30 am - 3:20 pmSAN-ORD
6h 50m1 stop
$152Southwest
Find Deal
Wed, Oct 8 - Sun, Oct 12
Frontier Logo
7:20 am - 11:50 pmORD-SAN
18h 30m1 stop
Frontier Logo
7:24 pm - 10:17 amSAN-ORD
12h 53m1 stop
$154Frontier
Find Deal
Wed, Oct 29 - Sun, Nov 2
Frontier Logo
7:30 am - 1:36 pmORD-SAN
8h 06m1 stop
Frontier Logo
9:03 pm - 9:37 amSAN-ORD
10h 34m1 stop
$155Frontier
Find Deal
Mon, Sep 29 - Sun, Oct 5
Southwest Logo
7:30 am - 3:45 pmORD-SAN
10h 15m1 stop
Southwest Logo
6:30 am - 3:20 pmSAN-ORD
6h 50m1 stop
$158Southwest
Find Deal
Sat, Oct 18 - Sun, Oct 26
United Airlines Logo
7:10 am - 9:44 amORD-SAN
4h 34mnonstop
United Airlines Logo
2:11 pm - 8:25 pmSAN-ORD
4h 14mnonstop
$187United Airlines
Find Deal
Thu, Jan 1 - Wed, Jan 7

Frontier flights from Chicago O'Hare Intl Airport to San Diego

Our best Frontier deals on Chicago O'Hare Intl Airport to San Diego flight tickets
Frontier
Sep 26
ORD7:30 amChicago O'Hare Intl
8h 06m
1 stop
SAN1:36 pmSan Diego
Sep 29
SAN2:31 pmSan Diego
6h 09m
1 stop
ORD10:40 pmChicago O'Hare Intl
$153
Find similar
Frontier
Oct 29
ORD7:20 amChicago O'Hare Intl
18h 30m
1 stop
SAN11:50 pmSan Diego
Nov 2
SAN7:24 pmSan Diego
12h 53m
1 stop
ORD10:17 amChicago O'Hare Intl
$154
Find similar
Frontier
Sep 29
ORD7:30 amChicago O'Hare Intl
8h 06m
1 stop
SAN1:36 pmSan Diego
Oct 5
SAN9:03 pmSan Diego
10h 34m
1 stop
ORD9:37 amChicago O'Hare Intl
$155
Find similar

Hawaiian Airlines flights from Chicago O'Hare Intl Airport to San Diego

Our best Hawaiian Airlines deals on Chicago O'Hare Intl Airport to San Diego flight tickets
Hawaiian Airlines
Oct 18
ORD10:00 amChicago O'Hare Intl
5h 00m
SAN1:00 pmSan Diego
Oct 25
SAN8:10 amSan Diego
4h 40m
ORD2:50 pmChicago O'Hare Intl
$144
Find similar
Hawaiian Airlines
Oct 18
ORD10:00 amChicago O'Hare Intl
5h 00m
SAN1:00 pmSan Diego
Oct 25
SAN8:10 amSan Diego
4h 40m
ORD2:50 pmChicago O'Hare Intl
$146
Find similar
Hawaiian Airlines
Oct 18
ORD3:50 pmChicago O'Hare Intl
5h 00m
SAN6:50 pmSan Diego
Oct 25
SAN5:19 pmSan Diego
4h 40m
ORD11:59 pmChicago O'Hare Intl
$148
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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, momondo users made 832,500 searches. Data last updated September 17, 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

Fly to

Route

Depart

Return

Price

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 10/23

3:50 pm-6:50 pm

Nonstop5h 00m

San Diego

Tue 10/28

12:45 pm-6:59 pm

Nonstop4h 14m

$133

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 10/29

2:54 pm-5:19 pm

Nonstop4h 25m

San Diego

Tue 11/11

5:49 pm-11:59 pm

Nonstop4h 10m

$139

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 11/14

7:10 am-9:39 am

Nonstop4h 29m

San Diego

Wed 11/19

10:30 pm-4:34 am

Nonstop4h 04m

$143

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 10/18

10:00 am-1:00 pm

Nonstop5h 00m

San Diego

Sat 10/25

8:10 am-2:50 pm

Nonstop4h 40m

$144

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 10/18

10:00 am-1:00 pm

Nonstop5h 00m

San Diego

Sat 10/25

8:10 am-2:50 pm

Nonstop4h 40m

$146

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 10/8

6:55 pm-11:20 pm

1 stop6h 25m

San Diego

Sun 10/12

6:30 am-3:20 pm

1 stop6h 50m

$152

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 10/29

7:20 am-11:50 pm

1 stop18h 30m

San Diego

Sun 11/2

7:24 pm-10:17 am

1 stop12h 53m

$154

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Mon 9/29

7:30 am-1:36 pm

1 stop8h 06m

San Diego

Sun 10/5

9:03 pm-9:37 am

1 stop10h 34m

$155

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 10/18

7:30 am-3:45 pm

1 stop10h 15m

San Diego

Sun 10/26

6:30 am-3:20 pm

1 stop6h 50m

$158

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 1/1

7:10 am-9:44 am

Nonstop4h 34m

San Diego

Wed 1/7

2:11 pm-8:25 pm

Nonstop4h 14m

$187

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to San Diego

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 month to fly to San Diego?

If you are unable to visit San Diego during the month of September, then departing from Chicago O'Hare Intl Airport during the month August is also very affordable. Most momondo users find prices during this month for around $258.

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

The cheapest day to depart from Chicago O'Hare Intl Airport to San Diego is on a Thursday. Travelers who choose to depart for San Diego on a Thursday will often find tickets for as low as $361. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $460. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

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

The cheapest time of day to fly to San Diego is at noon when flights can be purchased for as low as $288. Flights in the afternoon are often more expensive with an average ticket price of $449.

What is the cheapest Chicago O'Hare Intl to San Diego flight route?

Fly from Chicago O'Hare Intl to San Diego for the best Chicago O'Hare Intl - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $364 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Chicago O'Hare Intl Airport for as low as $285 on momondo.

What cabin class options are available on Chicago O'Hare Intl to San Diego flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago O'Hare Intl Airport to San Diego flights?

You could potentially save up to 11% on your flight if you consider stops on a Chicago O'Hare Intl Airport to San Diego flight.

How have Chicago O'Hare Intl Airport to San Diego flight prices changed over time?

As of September 2025, prices for Chicago O'Hare Intl Airport to San Diego flights are approximately 41% cheaper when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to San Diego (ORD to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to San Diego

Best Price Found

$98

Fastest flight time

4h 17m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from Chicago O'Hare Intl Airport in the past 72 hours is $98. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Diego found on momondo in the last 72 hours is $174.
The fastest flight from Chicago O'Hare Intl Airport to San Diego takes 4h 17m
Direct flights go from Chicago O'Hare Intl Airport to San Diego every day.
There is 1 airport near San Diego: San Diego (SAN)
Search flight deals

  • How far is Chicago O'Hare Intl to San Diego by plane?

    San Diego is 1717.8 mi away from Chicago O'Hare Intl. In terms of flight time, this usually takes a little over 4h 20m.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to San Diego Airport?

    Prices for flights from Chicago O'Hare Intl Airport to San Diego Airport refresh daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to San Diego Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to San Diego Airport.

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

    The required travel and health documents for your San Diego 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 Diego Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to San Diego?

  • What is the most popular airline from Chicago O'Hare Intl Airport to San Diego?

Best airlines flying from Chicago O'Hare Intl Airport to San Diego

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to San Diego with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $93Free CancellationRating
6.3
8,023 reviews
Search Spirit Airlines flights
FrontierPriceFrom $102Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $138Free CancellationRating
7.8
2,729 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $139Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $162Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $223Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $226Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
SouthwestPriceFrom $296Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Alaska Airlines Flights From Chicago O'Hare Intl Airport to San Diego

    Across 28 Alaska Airlines flights from Chicago O'Hare Intl Airport to San Diego this week, the average price was $318, with the best Alaska Airlines deals starting from $139 round-trip. 10,000 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.

  • United Airlines Flights From Chicago O'Hare Intl Airport to San Diego

    United Airlines is also a popular choice for this route. United Airlines flight deals for Chicago O'Hare Intl Airport to San Diego start from as low as $226 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $468. United Airlines operates 37 flights to San Diego from Chicago O'Hare Intl Airport in an average week. Users have rated it 7.4/10 across 8,926 reviews.

Traveling to a place near San Diego?

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

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to San Diego?

Finding the right flight to San Diego from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Diego quick and easy, saving you time and money.

Can I find flights from Chicago to San Diego with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Chicago to San Diego flights to just show those with flexible booking policies.

How can momondo help me find flights from Chicago to San Diego?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Diego from Chicago.

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

Of course. momondo tracks the price of Chicago to San Diego flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your San Diego 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.
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