How popular is this Seattle to Carlsbad flight route?

Flights from Seattle/Tacoma Intl to Carlsbad have been viewed 270 times in the past calendar month.

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 $32. Users have also found prices from $89 and $90 on United Airlines and Delta, respectively.

Weekly flight availability from Seattle to Carlsbad

The most flights from SEA to C4D are scheduled on a Sunday (115 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (54 on average).

In terms of precipitation, rainfall in Carlsbad ranges from 0.0 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit Carlsbad when rainfall is around 0.0 in.

If weather is an important factor for your trip to Carlsbad, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

What are the cheapest flights from Seattle to Carlsbad?

Looking for the cheapest flight from Seattle to Carlsbad? While on average our users pay $1,050, our data indicates the cheapest price to be $84. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $137.

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: Horizon Air (100%), ITA Airways (100%), United Airlines( 94%).

What are the most popular airlines that fly from Seattle to Carlsbad?

The most popular airlines flying from Seattle to Carlsbad are Frontier, Alaska Airlines and Delta. Something to consider prior to booking your flight.

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 73 outbound flights to Carlsbad per day.

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.

Find Cheap Flights from Seattle to Carlsbad, CA

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Carlsbad are usually found in March or May, booked 84 days in advance, depart on a Thursday or Friday and return on a Thursday

Find flight deals from Seattle to Carlsbad

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	December
Cheapest in	March
Average price	$273

Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.

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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Everything you need to know about your flight from Seattle to Carlsbad

Prices

Airlines

What is the cheapest time of day to fly from SEA to C4D?

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 afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 9% on airfare.

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

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

Reviews of airlines servicing Carlsbad

Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited 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

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Alaska Airlines

7.9

Good

13,122 reviews

Alaska Airlines

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Delta

7.8

Good

8,677 reviews

Alaska Airlines

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

United Airlines

7.3

Good

10,440 reviews

Alaska Airlines

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

American Airlines

7.0

Good

12,188 reviews

Alaska Airlines

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Frontier

5.5

Fair

2,516 reviews

Alaska Airlines

7.9

Good

13,122 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

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 73 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 270 times in the past calendar month.
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 $32. Users have also found prices from $89 and $90 on United Airlines and Delta, 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: Horizon Air (100%), ITA Airways (100%), United Airlines( 94%).
What are the cheapest flights from Seattle to Carlsbad?
Looking for the cheapest flight from Seattle to Carlsbad? While on average our users pay $1,050, our data indicates the cheapest price to be $84. The most popular route (Seattle/Tacoma Intl - Los Angeles), is priced around $137.
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.

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Top 8 airlines flying from Seattle to Carlsbad

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$37	Average$232	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$99	Average$291	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$117	Average$293	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$119	Average$315	FlexibilityNo cancel fee	On-time75%
JetBlue	Cheapest$136	Average$238	FlexibilityNo cancel fee	On-time62%
Hawaiian Airlines	Cheapest$142	Average$366	FlexibilityNo cancel fee	On-time85%
United Airlines	Cheapest$148	Average$346	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$227	Average$367	FlexibilityNo cancel fee	On-time71%

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Cheap flights from Seattle (SEA) to Carlsbad, CA, CA

Find cheap flights from Seattle to Carlsbad with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Seattle to Carlsbad

Most accurate provider

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Popular in

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Cheapflights Insights

What is the cheapest time of day to fly from SEA to C4D?

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 afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 9% on airfare.

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

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

The most flights from SEA to C4D are scheduled on a Sunday (115 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (54 on average).

Reviews of airlines servicing Carlsbad

Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited 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.

Related info for your journey

What airport do you fly from for flights from Seattle to Carlsbad?

How popular is this Seattle to Carlsbad flight route?

What are the cheapest airlines to fly from Seattle to Carlsbad one-way?

What are the most reliable airlines from Seattle to Carlsbad?

What are the cheapest flights from Seattle to Carlsbad?

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

How can I find direct flights from Seattle to Carlsbad?

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

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.

Complete your trip

Complete your trip to Carlsbad by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Seattle to Carlsbad by cabin class

Find flights from Seattle to Carlsbad, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Seattle and Carlsbad flights

Browse other Seattle and Carlsbad flight options. Last updated on October 26, 2026.

Other flights from Seattle

Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on October 26, 2026.

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Seattle to Carlsbad flights

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Top 8 airlines flying from Seattle to Carlsbad

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