HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Costa Mesa

$75+ Cheap flights from Portland (PDX) 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LAX
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland 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 Portland to Costa Mesa are usually found in January or February, booked 57 days in advance, depart on a Thursday or Friday and return on a Saturday

Cheap flight deals from Portland to Costa Mesa

Keep the following information in mind while searching for Portland to Costa Mesa flight deals. Data was last updated September 17, 2025.

Round-trip from

$111
(Cheapflightsfares)

One-way from

$75
(Southwest)

Popular in

November

Cheapest in

January

Average price

$197
From Portland to Costa Mesa
Search Deals
One-way flight from Portland to Costa Mesa
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Portland to Costa Mesa

Cheapest flights from Portland to Costa Mesa
Explore the most affordable flight options available from Portland to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/132:15 pmPDX - LAX
Nonstop2h 23mFrontier
Mon 12/1510:44 amLAX - PDX
Nonstop2h 36mFrontier
Deal found 9/17$111
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:21 pmPDX - LAX
Nonstop2h 26mFrontier
Sun 11/99:51 amLAX - PDX
Nonstop2h 32mFrontier
Deal found 9/17$113
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1112:43 pmPDX - LAX
1 stop18h 52mFrontier
Sat 10/1810:46 amLAX - PDX
Nonstop2h 20mFrontier
Deal found 9/17$115
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/172:18 pmPDX - LAX
Nonstop2h 26mFrontier
Sat 10/1810:46 amLAX - PDX
Nonstop2h 20mFrontier
Deal found 9/16$116
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:21 pmPDX - LAX
Nonstop2h 26mFrontier
Sun 11/99:51 amLAX - PDX
Nonstop2h 32mFrontier
Deal found 9/16$118
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 11/11:21 pmPDX - LAX
Nonstop2h 26mFrontier
Fri 11/79:51 amLAX - PDX
Nonstop2h 32mFrontier
Deal found 9/17$119
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Thu 10/232:18 pmPDX - LAX
Nonstop2h 26mFrontier
Fri 10/319:51 amLAX - PDX
Nonstop2h 32mFrontier
Deal found 9/17$120
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/271:38 pmPDX - LAX
Nonstop2h 28mFrontier
Sun 9/289:44 amLAX - PDX
Nonstop2h 24mFrontier
Deal found 9/15$121
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:38 pmPDX - LAX
Nonstop2h 28mFrontier
Sat 10/1110:46 amLAX - PDX
Nonstop2h 20mFrontier
Deal found 9/15$122
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Sun 11/21:18 pmPDX - LAX
Nonstop2h 26mFrontier
Thu 11/69:51 amLAX - PDX
Nonstop2h 32mFrontier
Deal found 9/17$124
This Frontier deal was found by Cheapflights users on 9/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:05 amPDX - LAX
1 stop11h 13mFrontier
Sat 10/410:14 amLAX - PDX
Nonstop2h 24mFrontier
Deal found 9/17$125
This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1311:45 amPDX - LAX
1 stop8h 08mFrontier
Sat 10/2510:46 amLAX - PDX
Nonstop2h 20mFrontier
Deal found 9/17$128

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 September 17, 2025.
Use the filters below to find and compare flights from Portland to Costa Mesa that are best for you.

Fly from

Portland

Fly to

Costa Mesa

Route

Depart

Return

Price

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Tue 12/16

6:40 am-10:30 am

1 stop3h 50m

Los Angeles

Wed 1/7

5:40 am-11:45 am

1 stop6h 05m

$159

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Tue 10/14

3:50 pm-8:21 pm

1 stop4h 31m

Los Angeles

Sat 10/25

5:39 pm-10:45 pm

1 stop5h 06m

$162

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 10/18

12:25 pm-2:48 pm

Nonstop2h 23m

Los Angeles

Tue 10/21

9:00 am-11:29 am

Nonstop2h 29m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 11/15

5:55 pm-8:37 pm

Nonstop2h 42m

Los Angeles

Sat 11/22

7:55 pm-10:24 pm

Nonstop2h 29m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 10/22

12:30 pm-2:55 pm

Nonstop2h 25m

Los Angeles

Wed 10/29

2:18 pm-4:50 pm

Nonstop2h 32m

$177

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 10/29

10:23 am-12:49 pm

Nonstop2h 26m

Los Angeles

Sun 11/2

7:00 am-9:28 am

Nonstop2h 28m

$187

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Wed 10/8

12:30 pm-2:55 pm

Nonstop2h 25m

Los Angeles

Thu 10/16

8:55 pm-11:24 pm

Nonstop2h 29m

$187

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Mon 11/24

5:17 pm-7:41 pm

Nonstop2h 24m

Los Angeles

Wed 12/3

9:15 am-11:49 am

Nonstop2h 34m

$187

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Fri 10/10

9:30 pm-11:58 pm

Nonstop2h 28m

Los Angeles

Tue 10/14

7:01 am-9:30 am

Nonstop2h 29m

$187

PortlandLos Angeles

PDX - LAX

PDXLAX

Portland

Sat 10/11

5:07 pm-7:29 pm

Nonstop2h 22m

Los Angeles

Sun 10/12

7:00 am-9:28 am

Nonstop2h 28m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 23 results
1
2
3

Best time to book a flight from Portland to Costa Mesa

Have a flexible travel schedule? Discover the best time to fly to Costa Mesa from Portland 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 Portland to Costa Mesa

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to Costa Mesa. Price data was last updated on September 12, 2025.

The best time to book flights from Portland to Costa Mesa is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Portland to Costa Mesa (average of $246). Flying from Portland to Costa Mesa in March is currently the most expensive (average of $325). 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 PDX to CM3?

Find hourly flight availability from Portland 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 September 17, 2025.

When flying from Portland 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 Portland to Costa Mesa?

Use this chart to determine the cheapest time to fly round-trip from Portland to Costa Mesa. Price data was last updated on September 14, 2025.

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

Weekly flight availability from Portland to Costa Mesa

Explore weekly flight availability from Portland 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 September 17, 2025.

The most flights from PDX to CM3 are scheduled on a Monday (87 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 on average).

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 September 17, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and American Airlines from Portland 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

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Spirit Airlines
6.3
Okay
8,023 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,173 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Portland 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 airport do you fly from for flights from Portland to Costa Mesa?

    Most people fly from Portland (PDX) if they book a flight from Portland to Costa Mesa. On average, Portland has 66 outbound flights to Costa Mesa per day from 8 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

  • How popular is this Portland to Costa Mesa flight route?

    The Portland to Costa Mesa flight path was viewed by 196 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Portland to Costa Mesa?

    Airlines like Southwest, United Airlines, and Delta fly from Portland to Costa Mesa in about 2h 23m. The time it takes to get you to your destination can typically vary by up to 2h 08m. There are 834 mi between Portland and Costa Mesa. This flight may include one or multiple stops.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to Costa Mesa on time: China Eastern (98%), SAUDIA (96%), Aeromexico (94%).

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

    On average you can expect to pay $879 for a flight from Portland to Costa Mesa. The cheapest flight overall is $80 while the most popular route, (Portland - Los Angeles) is currently priced at $92.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Costa Mesa?

    Currently, January is the cheapest month in which you can book a flight from Portland to Costa Mesa (average of $246). Flying from Portland to Costa Mesa in March is currently the most expensive (average of $325). 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 Portland to Costa Mesa

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Las Vegas flights
Portland to Los Angeles flights
Portland to Ontario flights
Portland to San Diego flights
Portland to Santa Ana flights
Portland to San Francisco flights
Boise to Las Vegas flights
Portland to Palm Springs flights
Portland to Burbank flights
Portland to Sacramento flights
Boise to Los Angeles flights
Portland to Oakland flights
Portland to San Jose flights
Eugene to Los Angeles flights
Portland to Reno flights
Eugene to Las Vegas flights
Boise to San Diego flights
Boise to Santa Ana flights
Eugene to San Francisco flights
Boise to Burbank flights
Boise to Sacramento flights
Eugene to San Diego flights
Redmond to Las Vegas flights
Boise to Ontario flights
Portland to Fresno flights
Medford to Los Angeles flights
Redmond to Los Angeles flights
Boise to San Francisco flights
Boise to San Jose flights
Portland to Santa Barbara flights
Portland to Long Beach flights
Redmond to San Francisco flights
Eugene to Ontario flights
Medford to Las Vegas flights
Portland to San Luis Obispo flights
Portland to Santa Rosa flights
Medford to San Francisco flights
Medford to San Diego flights
Boise to Oakland flights
Boise to Palm Springs flights
Eugene to Burbank flights
Redmond to San Diego flights
Eugene to Oakland flights
Eugene to Sacramento flights
Eugene to Palm Springs flights
Eugene to San Jose flights
Redmond to Palm Springs flights
Medford to Santa Ana flights
Boise to Fresno flights
Boise to Reno flights

Top 8 airlines flying from Portland to Costa Mesa

Discover the top 8 airlines that operate flights from Portland 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$40Average$170FlexibilityNo cancel feeOn-time65%
FrontierCheapest$47Average$138FlexibilityNo cancel feeOn-time62%
DeltaCheapest$88Average$287FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$89Average$247FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$144Average$310FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$147Average$275FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$158Average$314FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$158Average$318FlexibilityNo cancel feeOn-time69%

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.