HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Costa Mesa

$81+ Cheap flights from Chicago (CHI) to Costa Mesa, CA

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — LAX
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Costa Mesa with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Chicago to Costa Mesa are usually found in September or August, booked 63 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Chicago to Costa Mesa

Keep the following information in mind while searching for Chicago to Costa Mesa flight deals. Data was last updated July 31, 2025.

Round-trip from

$140
(Mytrip)

One-way from

$81
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$274
From Chicago (CHI) to Costa Mesa
Search Deals
One-way flight from Chicago (CHI) to Costa Mesa
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Chicago to Costa Mesa

Cheapest flights from Chicago to Costa Mesa
Explore the most affordable flight options available from Chicago to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/137:09 pmORD - LAX
Nonstop4h 27mSpirit Airlines
Sat 8/167:58 pmLAX - ORD
1 stop13h 45mSpirit Airlines
Deal found 7/30$140
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:20 amORD - LAX
Nonstop4h 29mMultiple Airlines
Tue 8/2611:39 pmLAX - ORD
Nonstop4h 01mMultiple Airlines
Deal found 7/29$141
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:20 amORD - LAX
Nonstop4h 29mFrontier
Sun 8/244:49 pmLAX - ORD
Nonstop4h 22mFrontier
Deal found 7/30$150
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/308:50 pmMDW - LAX
Nonstop4h 20mSouthwest
Sat 9/611:15 pmLAX - MDW
Nonstop3h 55mSouthwest
Deal found 7/31$197
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:20 amMDW - LAX
1 stop7h 40mDelta
Sat 9/2710:45 pmLAX - MDW
1 stop7h 55mDelta
Deal found 7/31$217
This Gotogate deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:44 pmMDW - LAX
1 stop21h 13mFrontier
Sat 8/239:31 pmLAX - MDW
1 stop10h 37mFrontier
Deal found 7/29$236

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Costa Mesa 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, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Chicago to Costa Mesa that are best for you.

Fly from

Chicago

Fly to

Costa Mesa

Route

Depart

Return

Price

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Wed 8/13

7:09 pm-9:36 pm

Nonstop4h 27m

Los Angeles

Sat 8/16

7:58 pm-11:43 am

1 stop13h 45m

$140

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 8/23

6:20 am-8:49 am

Nonstop4h 29m

Los Angeles

Tue 8/26

11:39 pm-5:40 am

Nonstop4h 01m

$141

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Fri 8/22

6:20 am-8:49 am

Nonstop4h 29m

Los Angeles

Sun 8/24

4:49 pm-11:11 pm

Nonstop4h 22m

$150

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Sat 8/30

8:50 pm-11:10 pm

Nonstop4h 20m

Los Angeles

Tue 9/2

11:15 pm-5:10 am

Nonstop3h 55m

$197

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Sat 9/20

9:35 am-2:02 pm

1 stop6h 27m

Los Angeles

Wed 9/24

6:15 am-5:35 pm

1 stop9h 20m

$217

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Sat 8/16

2:44 pm-9:57 am

1 stop21h 13m

Los Angeles

Sat 8/23

9:31 pm-10:08 am

1 stop10h 37m

$236

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Fri 8/15

7:09 pm-9:36 pm

Nonstop4h 27m

$81

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 10/11

6:20 am-8:46 am

Nonstop4h 26m

$85

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Wed 9/17

9:10 pm-11:30 pm

Nonstop4h 20m

$99

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Wed 10/8

3:40 pm-6:08 pm

Nonstop4h 28m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 18 results
1
2

Best time to book a flight from Chicago to Costa Mesa

Have a flexible travel schedule? Discover the best time to fly to Costa Mesa from Chicago with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Costa Mesa

How far ahead should I book a flight from Chicago to Costa Mesa?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Costa Mesa. Price data was last updated on July 25, 2025.

To ensure you get the cheapest price possible for a flight from Chicago to Costa Mesa, you should look to book at least 63 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Chicago to Costa Mesa?

Currently, January is the cheapest month in which you can book a flight from Chicago to Costa Mesa (average of $246). Flying from Chicago to Costa Mesa in March is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to CM3?

Find hourly flight availability from Chicago to Costa Mesa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Chicago to Costa Mesa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Chicago to Costa Mesa?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Costa Mesa. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Chicago to Costa Mesa flight should consider departing on Friday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Costa Mesa

Explore weekly flight availability from Chicago to Costa Mesa. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 31, 2025.

The most flights from CHI to CM3 are scheduled on a Thursday (134 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (64 on average).

How much does it cost to fly round-trip from Chicago to Costa Mesa?

Reviews of airlines servicing Costa Mesa

Get insights into the airlines that provide service to Costa Mesa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Mesa. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Chicago to Costa Mesa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Costa Mesa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Chicago to Costa Mesa one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $81. However, be on the lookout for offers from Frontier and Southwest, as they are both options that can get you from Chicago to Costa Mesa for a low price.

  • What are the most reliable airlines from Chicago to Costa Mesa?

    Consider Asiana Airlines (93%), Austrian Airlines (90%) or Brussels Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from Chicago to Costa Mesa.

  • What are the cheapest flights from Chicago to Costa Mesa?

    Looking at all options, your cheapest flight can be booked for $80. While the most popular route (Chicago O'Hare Intl - Los Angeles) can be booked for $109 on average our data indicates $1,554 when flying from Chicago to Costa Mesa.

  • Can I find deals for flights from Chicago to Costa Mesa that include hotel bookings?

    Yes. In addition to deals on Chicago to Costa Mesa flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Costa Mesa?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Costa Mesa.

  • Can I find deals for business class flights from Chicago to Costa Mesa?

    Yes. Cheapflights offers flight deals from Chicago to Costa Mesa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago to Costa Mesa?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Costa Mesa (average of $246). Flying from Chicago to Costa Mesa in March is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chicago to Costa Mesa

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Las Vegas flights
O'Hare Intl to Los Angeles flights
Midway to Las Vegas flights
O'Hare Intl to San Francisco flights
O'Hare Intl to San Diego flights
O'Hare Intl to Ontario flights
St. Louis to Las Vegas flights
O'Hare Intl to Santa Ana flights
Midway to San Francisco flights
O'Hare Intl to Burbank flights
Midway to Los Angeles flights
O'Hare Intl to Sacramento flights
O'Hare Intl to Palm Springs flights
O'Hare Intl to Oakland flights
St. Louis to Los Angeles flights
O'Hare Intl to Reno flights
O'Hare Intl to San Jose flights
Rockford to Las Vegas flights
Midway to San Diego flights
Midway to Sacramento flights
St. Louis to San Francisco flights
O'Hare Intl to Fresno flights
Midway to Santa Ana flights
Midway to Long Beach flights
O'Hare Intl to Long Beach flights
St. Louis to San Diego flights
St. Louis to Reno flights
Midway to San Jose flights
St. Louis to Ontario flights
St. Louis to San Jose flights
Evansville to Los Angeles flights
Midway to Oakland flights
Midway to Palm Springs flights
Moline to Las Vegas flights
Midway to Ontario flights
Evansville to Santa Ana flights
Midway to Reno flights
Moline to San Jose flights
Evansville to Ontario flights
Midway to Burbank flights
Moline to Palm Springs flights
O'Hare Intl to Monterey flights
Peoria to Las Vegas flights
O'Hare Intl to Arcata flights
O'Hare Intl to Santa Barbara flights
St. Louis to Santa Ana flights
St. Louis to Sacramento flights
Evansville to Las Vegas flights
Moline to San Francisco flights
Midway to Fresno flights

Top 9 airlines flying from Chicago to Costa Mesa

Discover the top 9 airlines that operate flights from Chicago to Costa Mesa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$221FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$81Average$144FlexibilityNo cancel feeOn-time88%
Spirit AirlinesCheapest$88Average$196FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$147Average$365FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$167Average$425FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$179Average$386FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$411FlexibilityNo cancel feeOn-time69%
DeltaCheapest$192Average$313FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$210Average$440FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.