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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 2/3. 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.
Frontier Logo
6:11 pm - 7:15 pmORD-SAN
27h 04m2 stops
Frontier Logo
1:43 pm - 6:50 pmSAN-ORD
27h 07m1 stop
$162Frontier
Find Deal
Wed, Jan 7 - Wed, Jan 14
Alaska Airlines Logo
8:59 pm - 11:27 pmORD-SAN
4h 28mnonstop
Alaska Airlines Logo
1:45 pm - 7:54 pmSAN-ORD
4h 09mnonstop
$163Alaska Airlines
Find Deal
Fri, Dec 5 - Tue, Dec 9
Frontier Logo
9:53 pm - 2:10 pmORD-SAN
18h 17m1 stop
Frontier Logo
6:34 am - 12:12 amSAN-ORD
15h 38m1 stop
$164Frontier
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Thu, Dec 4 - Mon, Dec 8
Southwest Logo
7:15 am - 1:35 pmORD-SAN
8h 20m1 stop
Southwest Logo
11:20 am - 9:50 pmSAN-ORD
8h 30m1 stop
$168Southwest
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Wed, Dec 3 - Tue, Dec 9
United Airlines Logo
2:21 pm - 7:56 pmORD-SAN
7h 35m1 stop
United Airlines Logo
7:00 am - 1:11 pmSAN-ORD
4h 11mnonstop
$171United Airlines
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Fri, Dec 12 - Wed, Dec 17
Southwest Logo
2:15 pm - 9:05 pmORD-SAN
8h 50m1 stop
Southwest Logo
9:10 am - 9:50 pmSAN-ORD
10h 40m1 stop
$172Southwest
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Tue, Dec 2 - Sat, Dec 6
United Airlines Logo
7:10 am - 9:40 amORD-SAN
4h 30mnonstop
United Airlines Logo
5:08 pm - 11:15 pmSAN-ORD
4h 07mnonstop
$177United Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
6:10 pm - 8:48 pmORD-SAN
4h 38mnonstop
American Airlines Logo
6:20 am - 12:40 pmSAN-ORD
4h 20mnonstop
$187American Airlines
Find Deal
Tue, Nov 25 - Thu, Nov 27
Hawaiian Airlines Logo
2:59 pm - 5:24 pmORD-SAN
4h 25mnonstop
Hawaiian Airlines Logo
7:00 am - 5:50 pmSAN-ORD
8h 50m1 stop
$204Hawaiian Airlines
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Tue, Feb 24 - Wed, Feb 25
American Airlines Logo
7:50 pm - 10:26 pmORD-SAN
4h 36mnonstop
American Airlines Logo
6:20 am - 12:29 pmSAN-ORD
4h 09mnonstop
$206American Airlines
Find Deal
Fri, Jan 16 - Mon, Jan 19

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
Jan 7
ORD6:11 pmChicago O'Hare Intl
27h 04m
2 stops
SAN7:15 pmSan Diego
Jan 14
SAN1:43 pmSan Diego
27h 07m
1 stop
ORD6:50 pmChicago O'Hare Intl
$162
Find similar
Frontier
Dec 4
ORD9:53 pmChicago O'Hare Intl
18h 17m
1 stop
SAN2:10 pmSan Diego
Dec 8
SAN6:34 amSan Diego
15h 38m
1 stop
ORD12:12 amChicago O'Hare Intl
$164
Find similar
Frontier
Dec 4
ORD7:00 amChicago O'Hare Intl
14h 15m
1 stop
SAN7:15 pmSan Diego
Dec 5
SAN4:47 pmSan Diego
17h 07m
2 stops
ORD11:54 amChicago O'Hare Intl
$173
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
Dec 12
ORD2:21 pmChicago O'Hare Intl
7h 35m
1 stop
SAN7:56 pmSan Diego
Dec 17
SAN7:00 amSan Diego
4h 11m
ORD1:11 pmChicago O'Hare Intl
$171
Find similar
United Airlines
Dec 4
ORD7:10 amChicago O'Hare Intl
4h 30m
SAN9:40 amSan Diego
Dec 8
SAN5:08 pmSan Diego
4h 07m
ORD11:15 pmChicago O'Hare Intl
$177
Find similar
United Airlines
Dec 4
ORD2:21 pmChicago O'Hare Intl
7h 35m
1 stop
SAN7:56 pmSan Diego
Dec 8
SAN7:00 amSan Diego
4h 11m
ORD1:11 pmChicago O'Hare Intl
$193
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 3, 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

Wed 1/7

6:11 pm-7:15 pm

2 stops27h 04m

San Diego

Wed 1/14

1:43 pm-6:50 pm

1 stop27h 07m

$162

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 12/5

8:59 pm-11:27 pm

Nonstop4h 28m

San Diego

Tue 12/9

1:45 pm-7:54 pm

Nonstop4h 09m

$163

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 12/4

9:53 pm-2:10 pm

1 stop18h 17m

San Diego

Mon 12/8

6:34 am-12:12 am

1 stop15h 38m

$164

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 12/3

7:15 am-1:35 pm

1 stop8h 20m

San Diego

Tue 12/9

11:20 am-9:50 pm

1 stop8h 30m

$168

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 12/12

2:21 pm-7:56 pm

1 stop7h 35m

San Diego

Wed 12/17

7:00 am-1:11 pm

Nonstop4h 11m

$171

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 12/2

2:15 pm-9:05 pm

1 stop8h 50m

San Diego

Sat 12/6

9:10 am-9:50 pm

1 stop10h 40m

$172

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 12/4

7:10 am-9:40 am

Nonstop4h 30m

San Diego

Mon 12/8

5:08 pm-11:15 pm

Nonstop4h 07m

$177

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 11/25

6:10 pm-8:48 pm

Nonstop4h 38m

San Diego

Thu 11/27

6:20 am-12:40 pm

Nonstop4h 20m

$187

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 2/24

2:59 pm-5:24 pm

Nonstop4h 25m

San Diego

Wed 2/25

7:00 am-5:50 pm

1 stop8h 50m

$204

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 1/16

7:50 pm-10:26 pm

Nonstop4h 36m

San Diego

Mon 1/19

6:20 am-12:29 pm

Nonstop4h 09m

$206

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 October is also very affordable. Most momondo users find prices during this month for around $233.

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 $278. Flights in the afternoon are often more expensive with an average ticket price of $427.

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 $339 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 $266 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 19% 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

$99

Fastest flight time

4h 20m

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 $99. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Diego found on momondo in the last 72 hours is $193.
The fastest flight from Chicago O'Hare Intl Airport to San Diego takes 4h 20m
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 25m.

  • 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
8,114 reviews
Search Spirit Airlines flights
FrontierPriceFrom $104Free CancellationRating
5.8
3,117 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $142Free CancellationRating
8.0
11,235 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $165Free CancellationRating
7.2
11,036 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $168Free CancellationRating
7.8
2,799 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $176Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
DeltaPriceFrom $223Free CancellationRating
7.9
8,001 reviews
Search Delta flights
SouthwestPriceFrom $296Free CancellationRating
8.0
4,238 reviews
Search Southwest flights

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

    Across 10 Alaska Airlines flights from Chicago O'Hare Intl Airport to San Diego this week, the average price was $229, with the best Alaska Airlines deals starting from $142 round-trip. 11,235 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 3 flights to San Diego from Chicago O'Hare Intl Airport in an average week. Users have rated it 8.0/10 across 4,238 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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