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Cheap flights from Chicago O'Hare Intl Airport to San Diego from $77

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 1/18. 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

Enter your travel dates to find the best prices.
United Airlines Logo
2:40 pm - 8:49 pmORD-SAN
8h 09m1 stop
United Airlines Logo
7:00 am - 1:13 pmSAN-ORD
4h 13mnonstop
$161United Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
6:07 pm - 11:36 pmORD-SAN
7h 29m1 stop
Multiple Airlines Logo
5:10 pm - 11:37 pmSAN-ORD
4h 27mnonstop
$162Multiple Airlines
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Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
8:59 pm - 11:27 pmORD-SAN
4h 28mnonstop
Multiple Airlines Logo
6:25 am - 6:52 pmSAN-ORD
10h 27m1 stop
$163Multiple Airlines
Find Deal
Mon, Dec 15 - Thu, Dec 18
Alaska Airlines Logo
3:05 pm - 5:33 pmORD-SAN
4h 28mnonstop
Alaska Airlines Logo
5:31 pm - 11:59 pmSAN-ORD
4h 28mnonstop
$164Alaska Airlines
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Wed, Dec 17 - Fri, Dec 26
Alaska Airlines Logo
3:05 pm - 5:33 pmORD-SAN
4h 28mnonstop
Alaska Airlines Logo
1:45 pm - 7:54 pmSAN-ORD
4h 09mnonstop
$165Alaska Airlines
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Thu, Dec 11 - Tue, Dec 16
Alaska Airlines Logo
9:00 am - 11:43 amORD-SAN
4h 43mnonstop
Alaska Airlines Logo
8:00 am - 2:29 pmSAN-ORD
4h 29mnonstop
$166Alaska Airlines
Find Deal
Thu, Jan 8 - Tue, Jan 13
Alaska Airlines Logo
8:55 am - 11:22 amORD-SAN
4h 27mnonstop
Alaska Airlines Logo
5:10 pm - 11:37 pmSAN-ORD
4h 27mnonstop
$167Alaska Airlines
Find Deal
Sat, Dec 6 - Mon, Feb 2
Frontier Logo
6:20 am - 8:21 amORD-SAN
28h 01m2 stops
Frontier Logo
11:20 am - 9:58 pmSAN-ORD
8h 38m1 stop
$168Frontier
Find Deal
Sat, Jan 17 - Sat, Feb 14
Frontier Logo
8:15 am - 12:08 amORD-SAN
17h 53m2 stops
Frontier Logo
10:01 pm - 12:32 pmSAN-ORD
12h 31m1 stop
$169Frontier
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Fri, Feb 6 - Mon, Feb 9
Frontier Logo
5:08 pm - 1:15 pmORD-SAN
22h 07m1 stop
Frontier Logo
4:47 pm - 12:12 amSAN-ORD
29h 25m1 stop
$170Frontier
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Sun, Dec 21 - Wed, Dec 24

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
Jan 15
ORD7:50 pmChicago O'Hare Intl
4h 36m
SAN10:26 pmSan Diego
Jan 18
SAN6:20 amSan Diego
4h 09m
ORD12:29 pmChicago O'Hare Intl
$176
Find similar
American Airlines
Jan 16
ORD7:50 pmChicago O'Hare Intl
4h 36m
SAN10:26 pmSan Diego
Jan 19
SAN6:20 amSan Diego
4h 09m
ORD12:29 pmChicago O'Hare Intl
$191
Find similar
American Airlines
Feb 13
ORD5:49 pmChicago O'Hare Intl
4h 36m
SAN8:25 pmSan Diego
Feb 22
SAN3:23 pmSan Diego
4h 07m
ORD9:30 pmChicago O'Hare Intl
$198
Find similar

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

Our best United Airlines deals on Chicago O'Hare Intl Airport to San Diego flight tickets
United Airlines
Jan 13
ORD2:40 pmChicago O'Hare Intl
8h 09m
1 stop
SAN8:49 pmSan Diego
Jan 20
SAN7:00 amSan Diego
4h 13m
ORD1:13 pmChicago O'Hare Intl
$161
Find similar
United Airlines
Dec 12
ORD1:00 pmChicago O'Hare Intl
4h 30m
SAN3:30 pmSan Diego
Dec 15
SAN1:05 pmSan Diego
8h 05m
1 stop
ORD11:10 pmChicago O'Hare Intl
$183
Find similar
United Airlines
Nov 27
ORD1:30 pmChicago O'Hare Intl
4h 32m
SAN4:02 pmSan Diego
Dec 1
SAN10:30 pmSan Diego
4h 04m
ORD4:34 amChicago O'Hare Intl
$272
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 November 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

Tue 1/13

2:40 pm-8:49 pm

1 stop8h 09m

San Diego

Tue 1/20

7:00 am-1:13 pm

Nonstop4h 13m

$161

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 1/9

6:07 pm-11:36 pm

1 stop7h 29m

San Diego

Mon 1/12

5:10 pm-11:37 pm

Nonstop4h 27m

$162

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Mon 12/15

8:59 pm-11:27 pm

Nonstop4h 28m

San Diego

Thu 12/18

6:25 am-6:52 pm

1 stop10h 27m

$163

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 12/17

3:05 pm-5:33 pm

Nonstop4h 28m

San Diego

Fri 12/26

5:31 pm-11:59 pm

Nonstop4h 28m

$164

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 12/11

3:05 pm-5:33 pm

Nonstop4h 28m

San Diego

Tue 12/16

1:45 pm-7:54 pm

Nonstop4h 09m

$165

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 1/8

9:00 am-11:43 am

Nonstop4h 43m

San Diego

Tue 1/13

8:00 am-2:29 pm

Nonstop4h 29m

$166

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 12/6

8:55 am-11:22 am

Nonstop4h 27m

San Diego

Mon 2/2

5:10 pm-11:37 pm

Nonstop4h 27m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 1/17

6:20 am-8:21 am

2 stops28h 01m

San Diego

Sat 2/14

11:20 am-9:58 pm

1 stop8h 38m

$168

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 2/6

8:15 am-12:08 am

2 stops17h 53m

San Diego

Mon 2/9

10:01 pm-12:32 pm

1 stop12h 31m

$169

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sun 12/21

5:08 pm-1:15 pm

1 stop22h 07m

San Diego

Wed 12/24

4:47 pm-12:12 am

1 stop29h 25m

$170

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 typical price of a round-trip flight between Chicago O'Hare Intl Airport and San Diego?

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of October, then departing from Chicago O'Hare Intl Airport during the month September is also very affordable. Most momondo users find prices during this month for around $229.

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 $314. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $437. 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 $276. Flights in the afternoon are often more expensive with an average ticket price of $421.

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 $328 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 $255 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.

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

As of November 2025, prices for Chicago O'Hare Intl Airport to San Diego flights are approximately 15% 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

$97

Fastest flight time

4h 15m

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 $97. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Diego found on momondo in the last 72 hours is $190.
The fastest flight from Chicago O'Hare Intl Airport to San Diego takes 4h 15m
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 27m.

  • 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 $87Free CancellationRating
6.3
8,144 reviews
Search Spirit Airlines flights
FrontierPriceFrom $104Free CancellationRating
5.8
3,106 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $142Free CancellationRating
8.0
11,309 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $165Free CancellationRating
7.2
11,046 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $168Free CancellationRating
7.8
2,809 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $172Free CancellationRating
7.4
9,014 reviews
Search United Airlines flights
DeltaPriceFrom $223Free CancellationRating
7.9
8,006 reviews
Search Delta flights
SouthwestPriceFrom $296Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

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

    Across 16 Alaska Airlines flights from Chicago O'Hare Intl Airport to San Diego this week, the average price was $230, with the best Alaska Airlines deals starting from $142 round-trip. 11,309 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.

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

    Southwest is also a popular choice for this route. Southwest flight deals for Chicago O'Hare Intl Airport to San Diego start from as low as $296 round-trip, depending on your selected dates, with average Southwest deals seen on momondo around $501. Southwest operates 2 flights to San Diego from Chicago O'Hare Intl Airport in an average week. Users have rated it 8.0/10 across 4,244 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
National City
Imperial Beach
La Mesa
Poway
Borrego Springs
San Ysidro
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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