HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Carlsbad

$94+ Cheap flights from Seattle (SEA) to Carlsbad, 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Carlsbad 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 Seattle/Tacoma Intl to Carlsbad are usually found in January or March, booked 30 days in advance, depart on a Friday or Thursday and return on a Saturday

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 August 14, 2025.

Round-trip from

$135
(CheapOair)

One-way from

$94
(Southwest)

Popular in

December

Cheapest in

January

Average price

$237
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. 3% potential increase in price ($8 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 August 2025
Search Deals

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 August 14, 2025.

This CheapOair deal was found by Cheapflights users on 8/14. 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.
Wed 9/177:00 amSEA - LAX
1 stop17h 27mFrontier
Sat 9/209:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/14$135
This Cheapflightsfares deal was found by Cheapflights users on 8/13. 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 9/139:39 pmSEA - LAX
Nonstop2h 50mFrontier
Mon 9/154:45 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/13$136
This CheapOair deal was found by Cheapflights users on 8/12. 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.
Wed 10/151:02 pmSEA - LAX
Nonstop2h 49mFrontier
Mon 10/208:40 amLAX - SEA
1 stop9h 04mFrontier
Deal found 8/12$137
This Frontier deal was found by Cheapflights users on 8/13. 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.
Sat 9/139:39 pmSEA - LAX
Nonstop2h 50mFrontier
Sun 9/214:49 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/13$138
This Frontier deal was found by Cheapflights users on 8/13. 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.
Sat 9/69:39 pmSEA - LAX
Nonstop2h 50mFrontier
Tue 9/91:37 pmLAX - SEA
1 stop9h 22mFrontier
Deal found 8/13$139
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/116:24 pmSEA - LAX
Nonstop2h 50mFrontier
Sat 9/209:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/13$140
This Frontier deal was found by Cheapflights users on 8/14. 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 10/271:02 pmSEA - LAX
Nonstop2h 49mFrontier
Fri 10/315:41 pmLAX - SEA
Nonstop2h 56mFrontier
Deal found 8/14$141
This Frontier deal was found by Cheapflights users on 8/13. 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.
Sat 8/309:42 pmSEA - LAX
Nonstop2h 52mFrontier
Thu 9/44:45 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/13$142
This CheapOair deal was found by Cheapflights users on 8/13. 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.
Thu 9/44:36 pmSEA - LAX
1 stop27h 16mFrontier
Sun 9/76:03 pmLAX - SEA
1 stop18h 47mFrontier
Deal found 8/13$143
This Mytrip deal was found by Cheapflights users on 8/12. 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.
Sat 9/69:39 pmSEA - LAX
Nonstop2h 50mFrontier
Sat 9/136:45 amLAX - SEA
1 stop13h 54mFrontier
Deal found 8/12$144
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Sat 9/279:39 pmSEA - LAX
Nonstop2h 50mFrontier
Sat 10/49:08 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/13$145
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 9/2610:10 amSEA - LAX
Nonstop2h 50mFrontier
Mon 9/294:45 pmLAX - SEA
Nonstop2h 51mFrontier
Deal found 8/12$146

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 August 14, 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

Mon 9/15

1:47 pm-7:52 pm

1 stop6h 05m

Los Angeles

Thu 9/18

4:45 pm-7:36 pm

Nonstop2h 51m

$138

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 9/22

10:10 am-1:00 pm

Nonstop2h 50m

Los Angeles

Thu 9/25

4:45 pm-7:36 pm

Nonstop2h 51m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 9/20

7:00 am-5:30 pm

1 stop10h 30m

Los Angeles

Sat 9/20

9:08 pm-11:59 pm

Nonstop2h 51m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 9/6

9:39 pm-12:29 am

Nonstop2h 50m

Los Angeles

Mon 9/8

2:03 pm-12:30 am

1 stop10h 27m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 9/12

6:12 am-5:18 pm

1 stop11h 06m

Los Angeles

Sat 9/20

9:08 pm-11:59 pm

Nonstop2h 51m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 9/6

9:39 pm-12:29 am

Nonstop2h 50m

Los Angeles

Wed 9/10

1:37 pm-10:59 pm

1 stop9h 22m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Thu 9/4

6:12 am-5:18 pm

1 stop11h 06m

Los Angeles

Sat 9/13

9:08 pm-11:59 pm

Nonstop2h 51m

$139

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 9/3

10:08 am-1:06 pm

Nonstop2h 58m

Los Angeles

Wed 9/3

4:41 pm-11:42 pm

1 stop7h 01m

$143

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 10/24

2:31 pm-12:25 am

1 stop9h 54m

Los Angeles

Mon 10/27

4:52 pm-7:48 pm

Nonstop2h 56m

$143

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 10/26

7:28 pm-7:53 pm

1 stop24h 25m

Los Angeles

Sat 11/1

4:17 pm-2:37 pm

1 stop22h 20m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 results
1
2

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 August 8, 2025.

Booking 30 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 $246). Flying from Seattle to Carlsbad 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 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 August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Carlsbad as you normally would.

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 Friday at noon when fares are most often at their lowest. Sunday afternoons 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 August 14, 2025.

The most flights from SEA to C4D are scheduled on a Thursday (139 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (65 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 August 14, 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
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Spirit Airlines
6.3
Okay
8,046 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Frontier
5.8
Fair
3,217 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 96 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 312 times in the past calendar month.

  • 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 France (95%), China Eastern (95%), Japan Airlines( 92%).

  • What are the cheapest flights from Seattle to Carlsbad?

    Looking for the cheapest flight from Seattle to Carlsbad? While on average our users pay $442, our data indicates the cheapest price to be $87. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $82.

  • 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 $246). Flying from Seattle to Carlsbad 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 Seattle to Carlsbad

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

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$162FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$62Average$139FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$260FlexibilityNo cancel feeOn-time85%
DeltaCheapest$117Average$262FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$136Average$274FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$153Average$294FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$156Average$301FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$157Average$390FlexibilityNo cancel feeOn-time71%

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.