$105 Find Cheap Flights from Seattle to Carlsbad - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Carlsbad departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$170
Typical prices: $194-$329
Frontier
Mon 8/17Wed 8/19
SEA - LAX • Non-stop
Cheapest one-way
$105
Typical prices: $112-$226
Frontier
Wed 9/23
SEA - LAX • 1 stop
Arrival airport
You can't fly directly to Carlsbad. It is served by Los Angeles (LAX), located 81.6 miles from Carlsbad.
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Flight Deals
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Flight Deals

Cheap Flights from Seattle to Carlsbad (SEA-LAX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Carlsbad that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Carlsbad

Mon, Aug 17 - Wed, Aug 19
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$170Frontier
Tue, Aug 18 - Tue, Aug 25
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$171Frontier
Sat, Aug 15 - Sat, Aug 22
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$172Frontier
Tue, Aug 18 - Tue, Aug 25
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$173Frontier
Sun, Sep 13 - Fri, Sep 18
Frontier Logo
11:06 am - 2:01 pm
SEA
-
LAX
2h 55mnonstop
Frontier Logo
3:16 pm - 6:26 pm
LAX
-
SEA
3h 10mnonstop
$175Frontier
Fri, Jul 17 - Tue, Jul 21
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$176Frontier
Tue, Aug 18 - Thu, Aug 20
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$177Frontier
Fri, Jul 17 - Fri, Aug 21
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$178Frontier
Wed, Sep 9 - Thu, Sep 10
Frontier Logo
7:00 am - 12:03 am
SEA
-
LAX
17h 03m
1 stop
Frontier Logo
3:16 pm - 6:26 pm
LAX
-
SEA
3h 10mnonstop
$179Frontier
Thu, Aug 13 - Mon, Aug 24
Frontier Logo
10:34 am - 1:34 pm
SEA
-
LAX
3h 00mnonstop
Frontier Logo
3:04 pm - 5:51 pm
LAX
-
SEA
2h 47mnonstop
$180Frontier
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$105
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Seattle to Los Angeles

When to book flights from Seattle to Carlsbad

Are your dates flexible? Find out the best times to travel from Seattle to Carlsbad based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from Seattle to Carlsbad: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Seattle to Carlsbad 
LindaFlew with Alaska Airlines
SEA
-
LAX
Jun 2026
Once you’re past security, you have to take the tram to your gate area. It’s quick and easy.
MarisaFlew with American Airlines
SEA
-
LAX
Jun 2025
Take Alaska Airlines - Clear was great to have at both airports, especially seattle where there was a large security line
ReidFlew with United Airlines
SEA
-
LAX
Oct 2024
SeaTac does not have a very good or equitable system for security lines. First class passengers don’t have a TSA precheck option, while there are only 2 TSA precheck lines on opposite sides of the terminal. Highly recommend getting TSA plus Clear, as the airport heavily favors this combination, with each section of the terminal having one of these options. I almost missed my flight because the only TSA precheck line was about 45 minutes long.
BruceFlew with Alaska Airlines
SEA
-
LAX
Nov 2024
Tight interline connection at LAX - barely made the flight. Directions from AS arrival gate to separate AA commuter terminal for AS codeshare flight connecting to TUS would have been nice.
LauraFlew with Alaska Airlines
SEA
-
LAX
Jul 2024
LAX is a bit of a mess. Very long walk between terminals.
LaurenFlew with Delta
SEA
-
LAX
Feb 2024
If you have kids, bring your own screens. We were counting on the inflight entertainment and it was a definite letdown. Also, TSA Pre-check is only available at station 2, but wait times are posted at each station so you can see if it’s worth the walk.

FAQs for booking flights from Seattle to Carlsbad

  • Which airports will I be using when flying from Seattle to Carlsbad?

    When flying out of Seattle you’ll be using Seattle/Tacoma Intl. Carlsbad does not have its own airport so you’ll be flying into nearby Los Angeles airport, which is 81.6 mi away.

  • How long does a flight from Seattle to Carlsbad take?

    Direct flights cover the 954 miles separating Seattle and Carlsbad in about 2h 41m.

  • How many flights are there between Seattle and Carlsbad?

    123 direct flights run between Seattle and Carlsbad on a daily basis. On average, there are about 863 departures each week.

  • What’s the cheapest day of the week to fly between Seattle and Carlsbad?

    Consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Wednesdays and the most expensive ones on Saturdays.

  • How does KAYAK find such low prices on flights from Seattle to Carlsbad?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Carlsbad.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Carlsbad?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Carlsbad from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Carlsbad?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Carlsbad with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Carlsbad?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Carlsbad from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Seattle to Carlsbad?

    In the last 5 days, the cheapest one-way ticket between Seattle and Carlsbad found on KAYAK was with Frontier for $34. Frontier offered a round-trip connection from $61 and Hawaiian Airlines from $108.

Top tips for finding cheap flights from Seattle to Carlsbad

  • There is no airport in Carlsbad. Instead, you’ll be flying into Los Angeles Airport when flying between Seattle and Carlsbad.
  • The cheapest flight from Seattle to Carlsbad was found 68 days before departure, on average.
  • Book at least 3 weeks before departure in order to get a below-average price.
  • High season is considered to be June, July and August. The cheapest month to fly is March.

Reviews of the top 5 airlines serving Seattle to Carlsbad

 
Need help choosing which airline to fly with from Seattle to Carlsbad? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12589 reviews
7.0Entertainment
7.0Food
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

I was very surprised that at the Seattle airport, Alaska's main hub, that the gates were very small and very close together, and it was very hard to discourage between my flight, and the flight next to us going to Boise and the flight next to that going to Denver. Denver. The audio for all three Gates was at the same level, and almost impossible to differentiate unless they actually said their flight number and location. Location. People tried to get on our plane, before they were ready, because they were confused about the Denver announcements. We were on a Boeing 737- 800 00, that must have recently been redone. It actually had USB--c ports which really surprised me. The Apu was out on the plane, so when we got on it was very very hot. A lot of people were complaining. The gate agents were very professional, but it was a lot going on and even though there were two of them, I think they could have used another person to help them. Mandy was particularly helpful in getting me a window seat. Flight crew was up to the usual Alaska airline standard, which is very high. Can we please get another snack then garlic pretzels? It would also be nice, if they knew ahead that the flight was full, to offer to let us check in our bags for free at baggage check, and not at the gate!

8.0 ExcellentWilliam Drew, Jun 2026
SEA - SFO
Read more Alaska Airlines reviews

I was very surprised that at the Seattle airport, Alaska's main hub, that the gates were very small and very close together, and it was very hard to discourage between my flight, and the flight next to us going to Boise and the flight next to that going to Denver. Denver. The audio for all three Gates was at the same level, and almost impossible to differentiate unless they actually said their flight number and location. Location. People tried to get on our plane, before they were ready, because they were confused about the Denver announcements. We were on a Boeing 737- 800 00, that must have recently been redone. It actually had USB--c ports which really surprised me. The Apu was out on the plane, so when we got on it was very very hot. A lot of people were complaining. The gate agents were very professional, but it was a lot going on and even though there were two of them, I think they could have used another person to help them. Mandy was particularly helpful in getting me a window seat. Flight crew was up to the usual Alaska airline standard, which is very high. Can we please get another snack then garlic pretzels? It would also be nice, if they knew ahead that the flight was full, to offer to let us check in our bags for free at baggage check, and not at the gate!

On time, good seats, not overly full, up beast positive crew.

People were friendly. Flight was a little delayed. Maybe I missed the reason for it. Overall a nice experience.

Check in & bag drop was straightforward. Alaskair changed the gate approx 40 min before departure, and I only became aware due to Google wallet update to my boarding pass. Had to move from gate N1 to C9 which required use of the Train, luckily I had time available.

My boarding passes were pulled from my Apple wallet and my 3 family members who were all sitting together in the same row all got put middle seats and were one of the last to board and barely were able to get our bags in the luggage bins.

I was surprised by everything. The cleanliness, the punctuality, the friendliness of the crew… and the Wi-Fi! Please keep up the good work.

I had to cancel this trip due to medical reasons. I took out flight insurance but I was unable to cancel my reservation on either Kayak or Alaska. I need proof that I did not take this flight to get my refund. I have tried for a week and a half together that information from either Kayak or Alaska but so far I have gotten no response. I am very disappointed!

See what I wrote in the previous section. This was a terrible experience. I would like refund.. I even paid an extra $70 for an aisle seat closer to the front to ensure that I got off early enough to catch the next flight. The fact that the plane did not wait, and even left eearlier, knowing that the first flight came in late, and was moved to a terminal three train stops away is appalling. My friend that flew JetBlue, their flight was delayed and came in later and the connecting flight WAITED for them. How is it that JetBlue could do that, and Alaska could not.

Alaska Airlines staff go out of their way to accommodate my fragile musical instrument, every time. They are unlike any other airline. I've experienced this can-do attitude on several flights with different staff, so this must be the culture of their company. I appreciate Alaska!

It was a bumpy flight but the crew was very attentive and made it a safe and enjoyable experience.

Love me some Delta. One of the few airlines to recognize and support veterans. Easy boarding, flight was on time and arrived early and the flight attendants were excellent on this flight.

We sat on the runway for over an hour before departure. That was unwelcome.

The cabin temperature was nice and cool. The wifi was not working.

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

Food was surprisingly good but the WiFi was not great

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Had a broken tray in business class. Crew just shrugged it off.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Delayed by 2.5hrs any longer and they would’ve had to honour their own policy for breaking their own rules and regs. Not cool, especially when I have an infant child that needs to stay on a routine and they get schedules.

They had three choices for snacks - but you could only have one - and they ran out of the dark chocolate before they made it all the way down the aisle... Packed flight - limited service.

They opened my checked bag and even though my lock was tsa approved, they loose my lock and left my bag just like that. Incompetent people, very upset about it. I’ll try to avoid traveling with united

We fly to Ecuador frequently. Checking in is usually a hassle because most United agents take some time before they can verify that my passport doesn't require a visa to Ecuador. This time the process was even longer due to the cyber attack. But she was really nice to us. So glad we brought plenty of snacks to supplement the 3 flights from SEA to GYE.

We had selected seats in the app that were a 2x2 format in the middle of the plane. Our seats when we got on the plane had been moved to the back rows in a 3x1 format. What’s the point of paying up for tickets that allow seat selection if the airline will just change them?

The weather caused a delayed but I was impressed how United did everything they could to try to get us out which included bussing us to the plane doing a Hardstand and bringing us to the plane since the fog was too thick to tow the plane from the overnight stay in the cargo area.

Food was really good. Chicken curry delicious. Great service. Had 3 seats, what a pleasure. What about a healthier desert option on the dinner? Yogurt, fruit? Thankyou

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

Dreadful experience. Our flight was delayed more than 8 hours due to a maintenance issue and the assistance from rebooking was poor. I was travelling with a bad knee and needed assistance waited in one place more than 3 hours before someone came with a wheelchair. The woman next to me was a 91 year old great grandmother who had waited more than 4 hours. There were moments of support from the staff but it appeared as they were going against the direction of management. It was apathy, lack of ownership and dismissive responses with small moments of kindness and understanding typically from grey haired, female, veteran staff..

Everything was great except it became so hot on the plane I couldn’t sleep on my red eye flight. It didn’t really cool down till we started descending.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

Experience was fine. Seats were cramped, and we had to wait for repairs before we could take of. Even though the door remained open, we were warned that leaving the plane could cause difficulty trying to fly out later. Staff was pleasant, and climate control was fortunately working. We had trouble at the DFW terminal, but I don't think that was AA's fault.

This flight was fine but had no time to breathe as the connection was late from Sea to ORD.. Super stressful. If we checked bags, the trip would have been very distressed.

Boarding, Seating, Flight Attendants, flight was okay. My seat was uncomfortable.

The plane is old and really small. Crew was great

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

The ticketing agents were rude but then we had a great gate agent very nice we had to ride a buss out to where the plane was parked but it was in some back corner of the airport when we got to the plane the captain who was great btw was cleaning the plane because the same rude ticketing agent told them they we not contracted to vacuum the plane. The ride to las Vegas was fine We had a connecting flight to Dallas. The flight was fine but when we arrived in Dallas everyone who flew on any frontier airlines the picked up bags from baggage claim D15 had to wait over a hour for their bags to start we arrived at 11:30pm ish to the gate we didn't leave the baggage clamed till 12:50 am very not happy and i used to fly frontier 4 times a week for work in Denver i will not be using them again

Terrible communication with weather delay, lost baggage, near impossible to reach customer service

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Flight was delayed one hour. Notification to the crowd waiting near the gate was terrible…announcements were unclear and very hard to hear and therefore understand. Frontier does NOT send texts to notify, only email. The reader board over the gate itself was NEVER updated to indicate the gate had been changed. It’s like a bunch of children are running things.

We’ve all seen the YouTube vids of out of control passengers. But this was an instance of a highly aggressive, bully flight attendant. Yelling in the face of a vet with PTSD who was texting their family. And no , we had not yet been instructed to put our phones in airplane mode. My suggestion is that you should pay whatever difference there is in order to avoid Frontier airlines. Additionally, after 3hrs trying to get customer service frontier offered a $25 voucher. I declined. This experience was so traumatic. To be verbally assaulted and abused by a flight attendant that has the power to say “boo” and I miss my flight ( which was to a family member’s funeral ). Frontier is unsafe and I cannot impress enough how much I discourage anyone ( esp those with any kind of disability like PTSD ) flying on Frontier.

We had to wait in line over an hour just to check our bags. It's a good thing we were so early to the airport. Only one clerk was working and the line was around the corner and down the hall. No good. I felt bad for her. Not sure how she kept her sanity with all the upset people. Then we get to our gate and there is no seating. Everyone was standing. Then I realize it is not a gate at all, we still have to be shuttled to our airplane. Ugh. Then we were late taking off and missed a window of opportunity before the airport runways were shut down for some reason. (not frontier's fault the runway shut down.) The seats on the airline are crammed and there is no cushion. Never had a tighter seating arrangement while flying. My 6' 4" husband was absolutely miserable the whole time with knees digging in to the seat in front of him. You think you are getting a good deal on a ticket, and then wham! I had to pay 75 dollars for our checked bags and 75 dollars for a carry on. No other airline does that!!! And also, there is a 40 pound weight limit on checked bags... Would have been cheaper flying with another airline, and I would have at least gotten a snack and drink. Was thankful for the tiny cup of water at least.

I was surprised that all baggage, including carry on, were charged. Each additional bag went up in cost. Really disappointed in the additional costs.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

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

Complete your trip to Carlsbad with a hotel stay or car rental