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Costa Mesa

$80+ Cheap flights from Seattle (SEA) 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Costa Mesa are usually found in March or January, booked 65 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Seattle to Costa Mesa

Cheapest flights from Seattle to Costa Mesa
Explore the most affordable flight options available from Seattle to Costa Mesa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 29, 2026.

This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/75:59 pm
SEA
-
LAX
Nonstop2h 46m
Frontier
mar. 4/212:45 pm
LAX
-
SEA
Nonstop2h 57m
Frontier
Deal found 1/28$117
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
mié. 3/186:24 pm
SEA
-
LAX
Nonstop2h 48m
Frontier
mar. 3/242:37 pm
LAX
-
SEA
1 stop6h 26m
Frontier
Deal found 1/28$118
This Frontier deal was found by Cheapflights users on 1/28. 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.
mar. 3/176:24 pm
SEA
-
LAX
Nonstop2h 48m
Frontier
jue. 3/262:14 pm
LAX
-
SEA
Nonstop2h 55m
Frontier
Deal found 1/28$119
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
mar. 2/246:30 pm
SEA
-
LAX
1 stop13h 45m
Multiple Airlines
mar. 3/39:12 am
LAX
-
SEA
1 stop9h 06m
Multiple Airlines
Deal found 1/27$120
This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/196:24 pm
SEA
-
LAX
Nonstop2h 48m
Frontier
lun. 3/232:14 pm
LAX
-
SEA
Nonstop2h 55m
Frontier
Deal found 1/28$121
This Expedia deal was found by Cheapflights users on 1/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/2111:32 am
SEA
-
LAX
Nonstop2h 55m
Multiple Airlines
mar. 2/248:52 am
LAX
-
SEA
1 stop5h 56m
Multiple Airlines
Deal found 1/27$122
This Frontier deal was found by Cheapflights users on 1/28. 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.
vie. 3/136:24 pm
SEA
-
LAX
Nonstop2h 48m
Frontier
jue. 3/192:14 pm
LAX
-
SEA
Nonstop2h 55m
Frontier
Deal found 1/28$123
This Frontier deal was found by Cheapflights users on 1/27. 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.
jue. 4/239:35 pm
SEA
-
LAX
1 stop10h 43m
Frontier
dom. 4/262:45 pm
LAX
-
SEA
Nonstop2h 57m
Frontier
Deal found 1/27$124
This Super.com deal was found by Cheapflights users on 1/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/2310:42 am
SEA
-
LAX
Nonstop2h 48m
Frontier
dom. 5/32:45 pm
LAX
-
SEA
Nonstop2h 57m
Frontier
Deal found 1/27$126
This Travelocity deal was found by Cheapflights users on 1/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/310:50 pm
SEA
-
LAX
1 stop9h 39m
Multiple Airlines
mar. 4/142:45 pm
LAX
-
SEA
Nonstop2h 57m
Multiple Airlines
Deal found 1/28$127
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
sáb. 2/215:37 pm
SEA
-
LAX
1 stop13h 49m
Frontier
mié. 3/41:51 pm
LAX
-
SEA
1 stop22h 10m
Frontier
Deal found 1/27$128

Find flight deals from Seattle to Costa Mesa

Keep the following information in mind while searching for Seattle to Costa Mesa flight deals. Data was last updated enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$117
(Super.com)

One-way from

$80
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$190
Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Los Angeles flights.
Search Deals
From Seattle/Tacoma Intl to Costa Mesa
Search Deals
One-way flight from Seattle/Tacoma Intl to Costa Mesa
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($17 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 January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 enero 29, 2026.
Use the filters below to find and compare flights from Seattle to Costa Mesa that are best for you.

Fly from

Seattle

Fly to

Costa Mesa

Route

Depart

Return

Price

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

sáb. 2/28

7:05 pm-9:50 pm

Nonstop2h 45m

Los Angeles

mar. 3/3

6:00 pm-8:58 pm

Nonstop2h 58m

$137

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

mar. 4/7

6:59 pm-9:43 pm

Nonstop2h 44m

Los Angeles

lun. 4/13

6:00 am-8:59 am

Nonstop2h 59m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

mar. 4/14

5:35 pm-10:30 pm

1 stop4h 55m

Los Angeles

mar. 4/21

4:55 pm-9:00 pm

1 stop4h 05m

$152

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

mar. 4/28

6:50 am-1:00 pm

1 stop6h 10m

Los Angeles

sáb. 5/2

3:30 pm-7:40 pm

1 stop4h 10m

$152

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

vie. 3/27

1:30 pm-4:09 pm

Nonstop2h 39m

Los Angeles

lun. 3/30

8:30 pm-11:23 pm

Nonstop2h 53m

$157

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

vie. 3/20

5:55 pm-8:35 pm

Nonstop2h 40m

Los Angeles

lun. 3/23

8:30 pm-11:23 pm

Nonstop2h 53m

$157

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

vie. 5/1

5:35 pm-11:15 pm

1 stop5h 40m

Los Angeles

sáb. 5/2

3:30 pm-7:40 pm

1 stop4h 10m

$162

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

mar. 2/24

8:30 am-11:38 am

Nonstop3h 08m

Los Angeles

sáb. 2/28

6:35 pm-11:30 pm

1 stop4h 55m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

mar. 4/14

1:03 pm-8:22 pm

1 stop7h 19m

Los Angeles

jue. 4/16

7:00 am-2:38 pm

1 stop7h 38m

$177

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

jue. 5/7

6:15 am-11:30 am

1 stop5h 15m

Los Angeles

jue. 5/7

3:40 pm-11:05 pm

1 stop7h 25m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Seattle to Costa Mesa

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Costa Mesa. Price data was last updated on January 23, 2026.

The price you pay for your flight from Seattle to Costa Mesa may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, March is the cheapest month in which you can book a flight from Seattle to Costa Mesa (average of $48). Flying from Seattle to Costa Mesa in July is currently the most expensive (average of $119). 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 SEA to CM3?

Find hourly flight availability from Seattle 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 enero 29, 2026.

When flying from Seattle to Costa Mesa, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 12% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Costa Mesa. Price data was last updated on January 24, 2026.

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

Weekly flight availability from Seattle to Costa Mesa

Explore weekly flight availability from Seattle 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 enero 29, 2026.

The most flights from SEA to CM3 are scheduled on a Thursday (104 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (54 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 enero 29, 2026.
Read reviews from past customers who have flown Alaska Airlines, Delta, and United Airlines from Seattle to Costa Mesa. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,808 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,125 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,215 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Spirit Airlines
6.3
Okay
8,394 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Frontier
5.7
Fair
3,056 reviews
Alaska Airlines
8.0
Very good
11,808 reviews

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Related info for your journey

Find useful and relevant information for your journey from Seattle 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 Seattle to Costa Mesa?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Costa Mesa. You should not have trouble finding flights to Costa Mesa from Seattle/Tacoma Intl; the airport handles an average of 75 outbound flights to Costa Mesa per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the Seattle airport to Costa Mesa. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    The Seattle/Tacoma Intl to Costa Mesa flight path was viewed by 305 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 Seattle to Costa Mesa?

    Airlines like Alaska Airlines, Southwest, and Delta fly from Seattle to Costa Mesa in about 2h 39m. The time it takes to get you to your destination can typically vary by up to 2h 16m. Seattle and Costa Mesa are separated by a distance of 954 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $37. Users have also found prices from $38 and $75 on Spirit Airlines and Southwest, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Costa Mesa consider choosing Air China (94%), Copa Airlines (91%) or Virgin Australia (91%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Seattle to Costa Mesa? While on average our users pay $754, our data indicates the cheapest price to be $45. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $80.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Seattle to Costa Mesa (average of $48). Flying from Seattle to Costa Mesa in July is currently the most expensive (average of $119). 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.

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Alternative routes for Seattle to Costa Mesa

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Top 8 airlines flying from Seattle to Costa Mesa

Discover the top 8 airlines that operate flights from Seattle 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 enero 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$163FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$50Average$147FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$88Average$253FlexibilityNo cancel feeOn-time85%
DeltaCheapest$101Average$250FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$130Average$237FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$148Average$300FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$157Average$238FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$178Average$364FlexibilityNo cancel feeOn-time71%

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