Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago O'Hare Intl Airport to San Diego from $79

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 2/21. 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

Discover deals from 900+ travel sites with momondo.

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 Chicago O'Hare Intl Airport to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:00 am - 12:08 am
ORD
-
SAN
18h 08m2 stops
Frontier Logo
6:25 am - 11:14 pm
SAN
-
ORD
14h 49m1 stop
$158Frontier
Thu, Feb 5 - Thu, Feb 12
Multiple Airlines Logo
8:20 am - 11:09 am
ORD
-
SAN
4h 49mnonstop
Multiple Airlines Logo
9:18 pm - 8:43 am
SAN
-
ORD
9h 25m1 stop
$159Multiple Airlines
Wed, Mar 4 - Sat, Mar 7
Multiple Airlines Logo
12:44 pm - 5:51 pm
ORD
-
SAN
31h 07m2 stops
Multiple Airlines Logo
8:00 am - 4:53 pm
SAN
-
ORD
6h 53m1 stop
$160Multiple Airlines
Tue, Feb 10 - Sat, Feb 14
Multiple Airlines Logo
8:00 am - 1:57 pm
ORD
-
SAN
7h 57m1 stop
Multiple Airlines Logo
5:10 pm - 11:37 pm
SAN
-
ORD
4h 27mnonstop
$161Multiple Airlines
Mon, Jan 26 - Sun, Feb 1
Frontier Logo
8:25 am - 1:57 pm
ORD
-
SAN
7h 32m1 stop
Frontier Logo
6:30 am - 2:45 pm
SAN
-
ORD
30h 15m2 stops
$162Frontier
Fri, Jan 23 - Sun, Jan 25
United Airlines Logo
2:40 pm - 8:49 pm
ORD
-
SAN
8h 09m1 stop
United Airlines Logo
4:47 pm - 10:59 pm
SAN
-
ORD
4h 12mnonstop
$163United Airlines
Sat, Jan 31 - Mon, Feb 2
Multiple Airlines Logo
8:25 am - 1:57 pm
ORD
-
SAN
7h 32m1 stop
Multiple Airlines Logo
5:10 pm - 11:37 pm
SAN
-
ORD
4h 27mnonstop
$164Multiple Airlines
Fri, Feb 6 - Mon, Feb 9
Frontier Logo
8:25 am - 1:57 pm
ORD
-
SAN
7h 32m1 stop
Frontier Logo
8:00 am - 5:58 pm
SAN
-
ORD
7h 58m1 stop
$165Frontier
Fri, Feb 6 - Tue, Feb 10
Frontier Logo
9:17 pm - 11:28 am
ORD
-
SAN
16h 11m2 stops
Frontier Logo
6:55 am - 12:21 am
SAN
-
ORD
15h 26m1 stop
$166Frontier
Fri, Feb 20 - Sat, Mar 7
Alaska Airlines Logo
3:07 pm - 5:52 pm
ORD
-
SAN
4h 45mnonstop
Alaska Airlines Logo
5:42 pm - 11:59 pm
SAN
-
ORD
4h 17mnonstop
$167Alaska Airlines
Fri, Feb 20 - Mon, Feb 23

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
Feb 5
ORD8:00 amChicago O'Hare Intl
18h 08m
2 stops
SAN12:08 amSan Diego
Feb 12
SAN6:25 amSan Diego
14h 49m
1 stop
ORD11:14 pmChicago O'Hare Intl
$158
Frontier
Jan 23
ORD8:25 amChicago O'Hare Intl
7h 32m
1 stop
SAN1:57 pmSan Diego
Jan 25
SAN6:30 amSan Diego
30h 15m
2 stops
ORD2:45 pmChicago O'Hare Intl
$162
Frontier
Feb 6
ORD8:25 amChicago O'Hare Intl
7h 32m
1 stop
SAN1:57 pmSan Diego
Feb 10
SAN8:00 amSan Diego
7h 58m
1 stop
ORD5:58 pmChicago O'Hare Intl
$165

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

Our best American Airlines deals on Chicago O'Hare Intl Airport to San Diego flight tickets
American Airlines
Feb 5
ORD7:50 pmChicago O'Hare Intl
4h 36m
SAN10:26 pmSan Diego
Feb 8
SAN6:20 amSan Diego
4h 09m
ORD12:29 pmChicago O'Hare Intl
$178
American Airlines
Feb 11
ORD7:50 pmChicago O'Hare Intl
4h 36m
SAN10:26 pmSan Diego
Feb 16
SAN10:35 pmSan Diego
4h 04m
ORD4:39 amChicago O'Hare Intl
$189
American Airlines
Feb 13
ORD7:09 pmChicago O'Hare Intl
4h 34m
SAN9:43 pmSan Diego
Feb 17
SAN10:35 pmSan Diego
4h 04m
ORD4:39 amChicago O'Hare Intl
$200

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 January 8, 2026.
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 2/5

8:00 am-12:08 am

2 stops18h 08m

San Diego

Thu 2/12

6:25 am-11:14 pm

1 stop14h 49m

$158

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 3/4

8:20 am-11:09 am

Nonstop4h 49m

San Diego

Sat 3/7

9:18 pm-8:43 am

1 stop9h 25m

$159

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 2/10

12:44 pm-5:51 pm

2 stops31h 07m

San Diego

Sat 2/14

8:00 am-4:53 pm

1 stop6h 53m

$160

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Mon 1/26

8:00 am-1:57 pm

1 stop7h 57m

San Diego

Sun 2/1

5:10 pm-11:37 pm

Nonstop4h 27m

$161

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 1/23

8:25 am-1:57 pm

1 stop7h 32m

San Diego

Sun 1/25

6:30 am-2:45 pm

2 stops30h 15m

$162

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 1/31

2:40 pm-8:49 pm

1 stop8h 09m

San Diego

Mon 2/2

4:47 pm-10:59 pm

Nonstop4h 12m

$163

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 2/6

8:25 am-1:57 pm

1 stop7h 32m

San Diego

Mon 2/9

5:10 pm-11:37 pm

Nonstop4h 27m

$164

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 2/6

8:25 am-1:57 pm

1 stop7h 32m

San Diego

Tue 2/10

8:00 am-5:58 pm

1 stop7h 58m

$165

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 2/20

9:17 pm-11:28 am

2 stops16h 11m

San Diego

Sat 3/7

6:55 am-12:21 am

1 stop15h 26m

$166

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 2/20

3:07 pm-5:52 pm

Nonstop4h 45m

San Diego

Mon 2/23

5:42 pm-11:59 pm

Nonstop4h 17m

$167

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 January, then departing from Chicago O'Hare Intl Airport during the month October is also very affordable. Most momondo users find prices during this month for around $221.

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 Friday. Travelers who choose to depart for San Diego on a Friday will often find tickets for as low as $291. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $373. 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 $264. Flights in the afternoon are often more expensive with an average ticket price of $364.

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 $300 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 $241 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 2% 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 January 2026, prices for Chicago O'Hare Intl Airport to San Diego flights are approximately 28% 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

$126

Fastest flight time

4h 12m

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 $126. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Diego found on momondo in the last 72 hours is $196.
The fastest flight from Chicago O'Hare Intl Airport to San Diego takes 4h 12m
Direct flights go from Chicago O'Hare Intl Airport to San Diego every day.
There is 1 airport in San Diego. From Chicago O'Hare Intl Airport there are direct flights to 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 12m.

  • 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 $84Free CancellationRating
6.3
8,289 reviews
Search Spirit Airlines flights
FrontierPriceFrom $103Free CancellationRating
5.7
3,060 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $142Free CancellationRating
8.0
11,672 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $153Free CancellationRating
7.8
2,824 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $160Free CancellationRating
7.4
9,142 reviews
Search United Airlines flights
American AirlinesPriceFrom $161Free CancellationRating
7.2
11,097 reviews
Search American Airlines flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,032 reviews
Search Delta flights

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

    Across 11 Alaska Airlines flights from Chicago O'Hare Intl Airport to San Diego this week, the average price was $255, with the best Alaska Airlines deals starting from $142 round-trip. 11,672 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.

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

    Hawaiian Airlines is also a popular choice for this route. Hawaiian Airlines flight deals for Chicago O'Hare Intl Airport to San Diego start from as low as $153 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $247. Hawaiian Airlines operates 13 flights to San Diego from Chicago O'Hare Intl Airport in an average week. Users have rated it 7.8/10 across 2,824 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
Poway
National City
Imperial Beach
Borrego Springs
La Mesa
San Ysidro
Alpine
Lemon Grove
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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/7
Sat 2/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States