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Cheap flights from Chicago O'Hare Intl Airport to San Diego from $99

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 5/6. 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
9:37 pm - 11:50 pm
ORD
-
SAN
28h 13m
1 stop
Frontier Logo
9:37 am - 8:32 pm
SAN
-
ORD
8h 55m
1 stop
$213Frontier
Fr, Mai 8 - Mo, Mai 11
Multiple Airlines Logo
6:55 am - 11:50 pm
ORD
-
SAN
18h 55m
2 stops
Multiple Airlines Logo
6:25 am - 12:04 pm
SAN
-
ORD
27h 39m
1 stop
$215Multiple Airlines
Di, Mai 12 - Sa, Mai 16
Frontier Logo
12:05 pm - 11:50 pm
ORD
-
SAN
13h 45m
2 stops
Frontier Logo
6:25 am - 8:32 pm
SAN
-
ORD
12h 07m
1 stop
$216Frontier
Sa, Mai 9 - Di, Mai 12
Frontier Logo
9:37 pm - 8:42 am
ORD
-
SAN
13h 05m
1 stop
Frontier Logo
6:25 am - 8:32 pm
SAN
-
ORD
12h 07m
1 stop
$217Frontier
Sa, Mai 9 - Mi, Mai 13
Frontier Logo
9:37 pm - 11:50 pm
ORD
-
SAN
28h 13m
1 stop
Frontier Logo
4:17 pm - 6:34 am
SAN
-
ORD
12h 17m
2 stops
$218Frontier
Di, Mai 19 - Di, Mai 26
Frontier Logo
6:55 am - 11:50 pm
ORD
-
SAN
18h 55m
2 stops
Frontier Logo
9:37 am - 8:32 pm
SAN
-
ORD
8h 55m
1 stop
$219Frontier
Fr, Mai 8 - Mo, Mai 11
Frontier Logo
6:55 am - 11:50 pm
ORD
-
SAN
18h 55m
2 stops
Frontier Logo
9:37 am - 8:32 pm
SAN
-
ORD
8h 55m
1 stop
$220Frontier
Fr, Mai 8 - Mo, Mai 11
Frontier Logo
9:37 pm - 8:42 am
ORD
-
SAN
13h 05m
1 stop
Frontier Logo
6:25 am - 4:06 pm
SAN
-
ORD
7h 41m
1 stop
$221Frontier
Sa, Mai 23 - Sa, Jun 6
Multiple Airlines Logo
9:37 pm - 11:50 pm
ORD
-
SAN
28h 13m
1 stop
Multiple Airlines Logo
5:44 pm - 11:55 pm
SAN
-
ORD
4h 11mnonstop
$223Multiple Airlines
Mo, Mai 11 - Sa, Mai 23
Frontier Logo
9:37 pm - 8:42 am
ORD
-
SAN
13h 05m
1 stop
Frontier Logo
6:25 am - 12:37 pm
SAN
-
ORD
28h 12m
2 stops
$224Frontier
Sa, Mai 23 - Di, Mai 26

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
May 8
ORD9:37 pmChicago O'Hare Intl
28h 13m
1 stop
SAN11:50 pmSan Diego
May 11
SAN9:37 amSan Diego
8h 55m
1 stop
ORD8:32 pmChicago O'Hare Intl
$213
Frontier
May 9
ORD12:05 pmChicago O'Hare Intl
13h 45m
2 stops
SAN11:50 pmSan Diego
May 12
SAN6:25 amSan Diego
12h 07m
1 stop
ORD8:32 pmChicago O'Hare Intl
$216
Frontier
May 9
ORD9:37 pmChicago O'Hare Intl
13h 05m
1 stop
SAN8:42 amSan Diego
May 13
SAN6:25 amSan Diego
12h 07m
1 stop
ORD8:32 pmChicago O'Hare Intl
$217

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
May 20
ORD7:05 amChicago O'Hare Intl
4h 37m
SAN9:42 amSan Diego
May 27
SAN10:40 pmSan Diego
4h 09m
ORD4:49 amChicago O'Hare Intl
$219
United Airlines
May 19
ORD8:46 amChicago O'Hare Intl
4h 39m
SAN11:25 amSan Diego
May 26
SAN8:32 pmSan Diego
7h 14m
1 stop
ORD5:46 amChicago O'Hare Intl
$229

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 April 22, 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

Cheapest round-trip

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fr 5/8

9:37 pm-11:50 pm

1 stop28h 13m

San Diego

Mo 5/11

9:37 am-8:32 pm

1 stop8h 55m

$213

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Di 5/12

6:55 am-11:50 pm

2 stops18h 55m

San Diego

Sa 5/16

6:25 am-12:04 pm

1 stop27h 39m

$215

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sa 5/9

12:05 pm-11:50 pm

2 stops13h 45m

San Diego

Di 5/12

6:25 am-8:32 pm

1 stop12h 07m

$216

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sa 5/9

9:37 pm-8:42 am

1 stop13h 05m

San Diego

Mi 5/13

6:25 am-8:32 pm

1 stop12h 07m

$217

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Di 5/19

9:37 pm-11:50 pm

1 stop28h 13m

San Diego

Di 5/26

4:17 pm-6:34 am

2 stops12h 17m

$218

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fr 5/8

6:55 am-11:50 pm

2 stops18h 55m

San Diego

Mo 5/11

9:37 am-8:32 pm

1 stop8h 55m

$219

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fr 5/8

6:55 am-11:50 pm

2 stops18h 55m

San Diego

Mo 5/11

9:37 am-8:32 pm

1 stop8h 55m

$220
Quickest round-trip

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sa 5/23

9:37 pm-8:42 am

1 stop13h 05m

San Diego

Sa 6/6

6:25 am-4:06 pm

1 stop7h 41m

$221

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Mo 5/11

9:37 pm-11:50 pm

1 stop28h 13m

San Diego

Sa 5/23

5:44 pm-11:55 pm

Nonstop4h 11m

$223

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sa 5/23

9:37 pm-8:42 am

1 stop13h 05m

San Diego

Di 5/26

6:25 am-12:37 pm

2 stops28h 12m

$224

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 $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 Saturday. Travelers who choose to depart for San Diego on a Saturday will often find tickets for as low as $272. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $335. 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 $262. Flights in the afternoon are often more expensive with an average ticket price of $311.

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 from Chicago O'Hare Intl Airport 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 $277 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 $234 on momondo.

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

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport 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 35% 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 April 2026, prices for Chicago O'Hare Intl Airport to San Diego flights are approximately 2% more expensive 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

$171

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 $171. The best round-trip flight deal from Chicago O'Hare Intl Airport to San Diego found on momondo in the last 72 hours is $300.
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

Frequently asked questions about flying from Chicago O'Hare Intl Airport to San Diego

  • 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
8,631 reviews
Search Spirit Airlines flights
FrontierPriceFrom $98Free CancellationRating
5.6
2,981 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $138Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $147Free CancellationRating
7.9
12,273 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $157Free CancellationRating
7.1
11,655 reviews
Search American Airlines flights
United AirlinesPriceFrom $157Free CancellationRating
7.4
9,636 reviews
Search United Airlines flights
JetBluePriceFrom $167Free CancellationRating
7.2
2,950 reviews
Search JetBlue flights

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

    Across 2 Alaska Airlines flights from Chicago O'Hare Intl Airport to San Diego this week, the average price was $287, with the best Alaska Airlines deals starting from $147 round-trip. 12,273 users have rated Alaska Airlines on momondo, with an average score of 7.9/10.

  • 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 $138 round-trip, depending on your selected dates, with average Hawaiian Airlines deals seen on momondo around $240. Hawaiian Airlines operates 3 flights to San Diego from Chicago O'Hare Intl Airport in an average week. Users have rated it 7.8/10 across 2,837 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
Poway
San Ysidro
La Mesa
Imperial Beach
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

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