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$78+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Carlsbad are usually found in March or January, booked 63 days in advance, depart on a Friday or Thursday and return on a Friday

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 January 8, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$116
(Kiwi.com)

One-way from

$78
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$167
Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Los Angeles flights.
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From Seattle/Tacoma Intl to Carlsbad
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One-way flight from Seattle/Tacoma Intl to Carlsbad
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Highest demand for flights based on searches. 4% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This Orbitz deal was found by Cheapflights users on 1/7. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:21 pmSEA - LAX
1 stop4h 37mMultiple Airlines
Sat 3/142:14 pmLAX - SEA
Nonstop2h 55mMultiple Airlines
Deal found 1/7$117
This Frontier deal was found by Cheapflights users on 1/7. 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.
Tue 2/1012:09 pmSEA - LAX
Nonstop2h 53mFrontier
Thu 2/198:01 amLAX - SEA
Nonstop3h 00mFrontier
Deal found 1/7$118
This Frontier deal was found by Cheapflights users on 1/7. 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 3/206:24 pmSEA - LAX
Nonstop2h 48mFrontier
Tue 3/242:37 pmLAX - SEA
1 stop6h 26mFrontier
Deal found 1/7$119
This Kiwi.com deal was found by Cheapflights users on 1/6. 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.
Mon 2/21:11 pmSEA - LAX
1 stop19h 11mMultiple Airlines
Wed 2/44:07 pmLAX - SEA
1 stop17h 29mMultiple Airlines
Deal found 1/6$120
This Super.com deal was found by Cheapflights users on 1/7. 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.
Thu 1/2910:51 amSEA - LAX
Nonstop2h 55mFrontier
Sun 2/15:13 pmLAX - SEA
Nonstop2h 57mFrontier
Deal found 1/7$121
This Frontier deal was found by Cheapflights users on 1/6. 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 4/66:00 amSEA - LAX
Nonstop2h 46mFrontier
Thu 4/99:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 1/6$123
This Frontier deal was found by Cheapflights users on 1/5. 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 2/912:34 pmSEA - LAX
1 stop11h 56mFrontier
Thu 2/128:01 amLAX - SEA
Nonstop3h 00mFrontier
Deal found 1/5$124
This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
Mon 1/261:11 pmSEA - LAX
1 stop19h 11mMultiple Airlines
Fri 1/308:23 pmLAX - SEA
1 stop15h 16mMultiple Airlines
Deal found 1/5$125
This Super.com deal was found by Cheapflights users on 1/7. 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.
Sat 1/172:02 pmSEA - LAX
Nonstop2h 48mFrontier
Sat 2/289:46 amLAX - SEA
Nonstop2h 50mFrontier
Deal found 1/7$126
This Expedia deal was found by Cheapflights users on 1/7. 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.
Thu 1/2910:51 amSEA - LAX
Nonstop2h 55mMultiple Airlines
Mon 2/29:30 amLAX - SEA
Nonstop2h 59mMultiple Airlines
Deal found 1/7$127
This Kiwi.com deal was found by Cheapflights users on 1/8. 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 1/2910:51 amSEA - LAX
Nonstop2h 55mMultiple Airlines
Wed 2/48:00 amLAX - SEA
Nonstop3h 01mMultiple Airlines
Deal found 1/8$128

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 January 8, 2026.
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

Wed 2/4

5:53 pm-8:36 pm

Nonstop2h 43m

Los Angeles

Wed 2/11

7:45 pm-10:46 pm

Nonstop3h 01m

$137

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/31

8:15 pm-10:58 pm

Nonstop2h 43m

Los Angeles

Tue 2/3

2:56 pm-5:52 pm

Nonstop2h 56m

$137

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 1/30

7:15 am-10:05 am

Nonstop2h 50m

Los Angeles

Sat 1/31

5:40 pm-8:36 pm

Nonstop2h 56m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/31

11:17 am-1:55 pm

Nonstop2h 38m

Los Angeles

Mon 2/2

3:48 pm-6:43 pm

Nonstop2h 55m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 4/6

6:59 pm-9:43 pm

Nonstop2h 44m

Los Angeles

Sat 4/11

2:03 pm-5:01 pm

Nonstop2h 58m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 1/30

7:15 am-10:05 am

Nonstop2h 50m

Los Angeles

Sat 2/7

7:20 am-10:17 am

Nonstop2h 57m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/31

9:05 am-1:30 pm

1 stop4h 25m

Los Angeles

Sat 1/31

3:50 pm-8:10 pm

1 stop4h 20m

$151

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 2/21

6:50 am-3:50 pm

2 stops9h 00m

Los Angeles

Tue 2/24

1:10 pm-8:20 pm

1 stop7h 10m

$155

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/28

8:50 pm-9:02 am

1 stop12h 12m

Los Angeles

Thu 1/29

11:20 am-2:19 pm

Nonstop2h 59m

$157

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Fri 2/20

2:00 pm-4:35 pm

Nonstop2h 35m

Los Angeles

Fri 2/27

11:45 am-2:44 pm

Nonstop2h 59m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 22 results
1
2
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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 January 2, 2026.

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, March is the cheapest month in which you can book a flight from Seattle to Carlsbad (average of $47). 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 January 8, 2026.

One of the essential ways to save on airfare from Seattle to Carlsbad is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 4% 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 January 3, 2026.

Travelers seeking maximum savings on their Seattle to Carlsbad 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 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 January 8, 2026.

The most flights from SEA to C4D are scheduled on a Thursday (92 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (44 on average).

How much does it cost to fly round-trip from Seattle to Carlsbad?

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 January 8, 2026.
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
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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
11,672 reviews
Alaska Airlines
8.0
Very good
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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
8,032 reviews
Alaska Airlines
8.0
Very good
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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
9,142 reviews
Alaska Airlines
8.0
Very good
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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
8,289 reviews
Alaska Airlines
8.0
Very good
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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
3,061 reviews
Alaska Airlines
8.0
Very good
11,672 reviews

Comfort

7.8

Entertainment

7.0

Food

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

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 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 67 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 294 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 2h 43m. Fly via Alaska Airlines or Delta to get the fastest option. Seattle and Carlsbad are separated by a distance of 954 mi. All flights are typically nonstop.

  • What are the cheapest airlines to fly from Seattle to Carlsbad 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 Carlsbad?

    Before booking your flight to Carlsbad from Seattle, check out the most reliable airlines to get you to your destination on time: EL AL (96%), Air China (94%), Virgin Australia( 91%).

  • What are the cheapest flights from Seattle to Carlsbad?

    Looking for the cheapest flight from Seattle to Carlsbad? While on average our users pay $657, our data indicates the cheapest price to be $79. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $57.

  • 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, March is the cheapest month in which you can book a flight from Seattle to Carlsbad (average of $47). 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.

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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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$71Average$153FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$270FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$113Average$264FlexibilityNo cancel feeOn-time63%
DeltaCheapest$118Average$262FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$141Average$297FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$166Average$274FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$176Average$390FlexibilityNo cancel feeOn-time71%

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