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Carlsbad

$74+ Cheap flights from Seattle (SEA) to Carlsbad, CA, 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Carlsbad are usually found in January or March, booked 63 days in advance, depart on a Friday or Thursday and return on a Friday

Find flight deals from Seattle to Carlsbad

Cheapest flights from Seattle to Carlsbad
Explore the most affordable flight options available from Seattle to Carlsbad. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 18, 2025.

This Frontier deal was found by Cheapflights users on 11/17. 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.
Mon 12/82:25 pmSEA - LAX
Nonstop2h 45mFrontier
Thu 12/1110:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$123
This CheapOair deal was found by Cheapflights users on 11/17. 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 12/1312:48 pmSEA - LAX
1 stop18h 54mFrontier
Thu 12/1811:08 amLAX - SEA
1 stop26h 46mFrontier
Deal found 11/17$124
This CheapOair deal was found by Cheapflights users on 11/17. 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.
Mon 12/19:53 pmSEA - LAX
1 stop22h 12mFrontier
Sat 12/61:07 pmLAX - SEA
1 stop22h 46mFrontier
Deal found 11/17$127
This CheapOair deal was found by Cheapflights users on 11/17. 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 12/612:48 pmSEA - LAX
1 stop18h 54mFrontier
Sun 12/73:30 pmLAX - SEA
1 stop18h 36mFrontier
Deal found 11/17$128
This CheapOair deal was found by Cheapflights users on 11/17. 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 12/1312:48 pmSEA - LAX
1 stop18h 54mFrontier
Tue 12/239:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$129
This CheapOair deal was found by Cheapflights users on 11/17. 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.
Mon 12/812:48 pmSEA - LAX
1 stop24h 46mFrontier
Fri 12/1210:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$130
This CheapOair deal was found by Cheapflights users on 11/17. 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 12/612:48 pmSEA - LAX
1 stop18h 54mFrontier
Mon 12/810:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$131
This Expedia deal was found by Cheapflights users on 11/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:30 pmSEA - LAX
Nonstop2h 50mMultiple Airlines
Sat 12/1310:24 amLAX - SEA
Nonstop3h 06mMultiple Airlines
Deal found 11/16$132
This Kiwi.com deal was found by Cheapflights users on 11/17. 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.
Fri 12/54:46 pmSEA - LAX
1 stop17h 53mFrontier
Mon 12/810:24 amLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$133
This Expedia deal was found by Cheapflights users on 11/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:48 pmSEA - LAX
1 stop18h 54mFrontier
Sat 12/209:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$134
This Trip.com deal was found by Cheapflights users on 11/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - LAX
Nonstop2h 46mFrontier
Mon 1/59:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 11/17$136
This Expedia deal was found by Cheapflights users on 11/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:05 amSEA - LAX
Nonstop2h 53mMultiple Airlines
Thu 12/1110:24 amLAX - SEA
Nonstop3h 06mMultiple Airlines
Deal found 11/17$137

Cheap flight deals from Seattle to Carlsbad

Keep the following information in mind while searching for Seattle to Carlsbad flight deals. Data was last updated November 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$123
(Frontier)

One-way from

$74
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$272
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 Carlsbad
Search Deals
One-way flight from Seattle/Tacoma Intl to Carlsbad
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Carlsbad 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 November 18, 2025.
Use the filters below to find and compare flights from Seattle to Carlsbad that are best for you.

Fly from

Seattle

Fly to

Carlsbad

Route

Depart

Return

Price

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 2/1

9:25 pm-10:25 am

1 stop13h 00m

Los Angeles

Sun 2/8

8:03 pm-11:19 am

1 stop15h 16m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 12/7

12:48 pm-7:42 am

1 stop18h 54m

Los Angeles

Fri 12/12

8:51 pm-11:53 am

1 stop15h 02m

$142

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 12/16

2:59 pm-5:40 pm

Nonstop2h 41m

Los Angeles

Thu 12/18

9:36 pm-12:42 am

Nonstop3h 06m

$143

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 2/11

11:20 am-3:15 pm

1 stop3h 55m

Los Angeles

Sun 2/15

4:45 pm-11:40 pm

1 stop6h 55m

$154

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 12/12

3:40 pm-6:38 pm

1 stop26h 58m

Los Angeles

Mon 12/15

10:24 am-1:30 pm

Nonstop3h 06m

$159

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 2/10

11:17 am-1:55 pm

Nonstop2h 38m

Los Angeles

Mon 2/16

3:48 pm-6:43 pm

Nonstop2h 55m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 12/17

8:25 am-12:55 pm

1 stop4h 30m

Los Angeles

Wed 12/24

6:59 pm-10:02 pm

Nonstop3h 03m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Tue 12/16

8:10 pm-10:58 pm

Nonstop2h 48m

Los Angeles

Thu 12/25

7:59 pm-11:02 pm

Nonstop3h 03m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 12/12

5:59 pm-8:43 pm

Nonstop2h 44m

Los Angeles

Mon 12/15

7:40 am-10:45 am

Nonstop3h 05m

$167

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/7

11:20 am-3:15 pm

1 stop3h 55m

Los Angeles

Mon 1/12

2:30 pm-6:35 pm

1 stop4h 05m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 21 results
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Best time to book a flight from Seattle to Carlsbad

Have a flexible travel schedule? Discover the best time to fly to Carlsbad 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 Carlsbad

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Carlsbad. Price data was last updated on November 14, 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Carlsbad. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Carlsbad (average of $38). Flying from Seattle to Carlsbad 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 C4D?

Find hourly flight availability from Seattle to Carlsbad. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 18, 2025.

One of the essential ways to save on airfare from Seattle to Carlsbad is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 15% on airfare.

What is the cheapest day to fly from Seattle to Carlsbad?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Carlsbad. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Carlsbad flight should consider departing on Saturday 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 Carlsbad

Explore weekly flight availability from Seattle to Carlsbad. 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 November 18, 2025.

The most flights from SEA to C4D are scheduled on a Tuesday (98 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Reviews of airlines servicing Carlsbad

Get insights into the airlines that provide service to Carlsbad. 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 Carlsbad. Reviews last updated November 18, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and United Airlines from Seattle to Carlsbad by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,316 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,003 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,019 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Spirit Airlines
6.3
Okay
8,151 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Frontier
5.8
Fair
3,105 reviews
Alaska Airlines
8.0
Very good
11,316 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Carlsbad. 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 Carlsbad?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Carlsbad. 8 airlines have flights from Seattle/Tacoma Intl to Carlsbad on a regular basis. Booking flights from Seattle/Tacoma Intl to Carlsbad should not be difficult; the airport handles an average of 61 outbound flights to Carlsbad per day.

  • How popular is this Seattle to Carlsbad flight route?

    Flights from Seattle/Tacoma Intl to Carlsbad have been viewed 316 times in the past calendar month.

  • How long is the flight from Seattle to Carlsbad?

    There are many flights that can get you from Seattle to Carlsbad in 3h 55m. Fly via Frontier or Southwest to get the fastest option. Seattle and Carlsbad are separated by a distance of 954 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Seattle to Carlsbad?

    Before booking your flight to Carlsbad from Seattle, check out the most reliable airlines to get you to your destination on time: Air China (97%), ITA Airways (97%), China Eastern( 96%).

  • What are the cheapest flights from Seattle to Carlsbad?

    Looking for the cheapest flight from Seattle to Carlsbad? While on average our users pay $874, our data indicates the cheapest price to be $66. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $70.

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

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

  • How can I find direct flights from Seattle to Carlsbad?

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

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

    Yes. Cheapflights offers flight deals from Seattle to Carlsbad 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 Carlsbad?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Carlsbad (average of $38). Flying from Seattle to Carlsbad 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.

See more FAQs

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Top 8 airlines flying from Seattle to Carlsbad

Discover the top 8 airlines that operate flights from Seattle to Carlsbad. 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$167FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$71Average$160FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$258FlexibilityNo cancel feeOn-time85%
DeltaCheapest$118Average$264FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$130Average$271FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$147Average$283FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$155Average$298FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$177Average$384FlexibilityNo cancel feeOn-time71%

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