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Carlsbad

$111+ Cheap flights from Boston (BOS) 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LAX
Jan 26 — Feb 21
Mon 1/26
Mon 2/2
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Carlsbad are usually found in September or January, booked 61 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Boston to Carlsbad

Cheapest flights from Boston to Carlsbad
Explore the most affordable flight options available from Boston to Carlsbad. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 27, 2025.

This American Airlines deal was found by Cheapflights users on 12/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:26 amBOS - LAX
1 stop9h 21mAmerican Airlines
Mon 2/210:00 pmLAX - BOS
Nonstop5h 25mAmerican Airlines
Deal found 12/26$343
This Kiwi.com deal was found by Cheapflights users on 12/25. 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.
Sat 12/275:12 pmBOS - LAX
1 stop10h 10mAlaska Airlines
Sat 1/34:56 pmLAX - BOS
1 stop11h 52mAlaska Airlines
Deal found 12/25$348
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:28 pmBOS - LAX
1 stop9h 32mUnited Airlines
Wed 1/78:20 amLAX - BOS
Nonstop5h 32mUnited Airlines
Deal found 12/26$367
This Delta deal was found by Cheapflights users on 12/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:30 pmBOS - LAX
1 stop9h 31mDelta
Mon 1/129:45 pmLAX - BOS
Nonstop5h 29mDelta
Deal found 12/25$382
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:28 pmBOS - LAX
1 stop9h 32mUnited Airlines
Mon 1/512:30 amLAX - BOS
1 stop9h 16mUnited Airlines
Deal found 12/26$397
This JetBlue deal was found by Cheapflights users on 12/25. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:00 amBOS - LAX
Nonstop6h 32mJetBlue
Fri 1/21:42 pmLAX - BOS
Nonstop5h 27mJetBlue
Deal found 12/25$402
This American Airlines deal was found by Cheapflights users on 12/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:55 pmBOS - LAX
1 stop10h 01mAmerican Airlines
Sun 1/1112:30 amLAX - BOS
1 stop7h 51mAmerican Airlines
Deal found 12/26$407
This Southwest deal was found by Cheapflights users on 12/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amBOS - LAX
1 stop12h 45mSouthwest
Fri 1/912:30 pmLAX - BOS
1 stop7h 00mSouthwest
Deal found 12/26$412
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:30 pmBOS - LAX
1 stop9h 31mDelta
Wed 1/79:45 pmLAX - BOS
Nonstop5h 29mDelta
Deal found 12/24$422
This Frontier deal was found by Cheapflights users on 12/26. 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 12/276:00 amBOS - LAX
1 stop11h 03mFrontier
Tue 1/61:59 pmLAX - BOS
1 stop8h 20mFrontier
Deal found 12/26$427

Find flight deals from Boston to Carlsbad

Keep the following information in mind while searching for Boston to Carlsbad flight deals. Data was last updated December 27, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$179
(Delta)

One-way from

$111
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$436
Provider with most accurate pricing for Boston Logan Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Los Angeles flights.
Search Deals
From Boston Logan Intl to Carlsbad
Search Deals
One-way flight from Boston Logan Intl to Carlsbad
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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 December 27, 2025.
Use the filters below to find and compare flights from Boston to Carlsbad that are best for you.

Fly from

Boston

Fly to

Carlsbad

Route

Depart

Return

Price

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Fri 1/30

6:00 am-9:34 am

Nonstop6h 34m

Los Angeles

Mon 2/2

8:38 pm-5:00 am

Nonstop5h 22m

$179

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Sun 1/25

7:30 am-11:22 am

Nonstop6h 52m

Los Angeles

Mon 2/2

9:45 pm-6:14 am

Nonstop5h 29m

$179

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Mon 1/19

6:00 am-9:34 am

Nonstop6h 34m

Los Angeles

Fri 1/23

8:38 pm-5:00 am

Nonstop5h 22m

$179

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Sat 1/31

8:20 pm-11:56 pm

Nonstop6h 36m

Los Angeles

Mon 2/2

8:38 pm-5:00 am

Nonstop5h 22m

$179

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Tue 1/27

8:20 pm-11:56 pm

Nonstop6h 36m

Los Angeles

Thu 1/29

7:00 am-3:31 pm

Nonstop5h 31m

$183

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Wed 1/28

8:20 pm-11:56 pm

Nonstop6h 36m

Los Angeles

Sun 2/1

7:10 am-3:41 pm

Nonstop5h 31m

$192

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Tue 1/20

4:50 pm-10:00 pm

1 stop8h 10m

Los Angeles

Sun 1/25

6:15 am-5:15 pm

1 stop8h 00m

$193

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Sun 2/1

6:00 am-9:34 am

Nonstop6h 34m

Los Angeles

Mon 2/2

8:38 pm-5:00 am

Nonstop5h 22m

$197

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Sat 1/17

2:50 pm-9:30 pm

1 stop9h 40m

Los Angeles

Tue 1/20

6:05 am-10:05 pm

1 stop13h 00m

$198

BostonLos Angeles

BOS - LAX

BOSLAX

Boston Logan Intl

Tue 1/13

8:25 am-12:03 pm

Nonstop6h 38m

Los Angeles

Fri 1/16

12:30 am-12:46 pm

1 stop9h 16m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 23 results
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Best time to book a flight from Boston to Carlsbad

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

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Carlsbad. Price data was last updated on December 19, 2025.

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston 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 Boston to Carlsbad?

Currently, August is the cheapest month in which you can book a flight from Boston to Carlsbad (average of $115). Flying from Boston to Carlsbad in December is currently the most expensive (average of $179). 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 BOS to C4D?

Find hourly flight availability from Boston 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 December 27, 2025.

One of the essential ways to save on airfare from Boston 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 29% on airfare.

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

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

Travelers seeking maximum savings on their Boston to Carlsbad flight should consider departing on Wednesday 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 Boston to Carlsbad

Explore weekly flight availability from Boston 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 December 27, 2025.

The most flights from BOS to C4D are scheduled on a Friday (55 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost to fly round-trip from Boston 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 December 27, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Boston to Carlsbad to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,018 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
9,116 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
11,068 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
JetBlue
7.2
Good
2,900 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Spirit Airlines
6.3
Okay
8,210 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

    If you book a flight to Carlsbad from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 47 flights from Logan Intl to Carlsbad per day from 11 different airlines.

  • How popular is this Boston to Carlsbad flight route?

    This flight path from Boston Logan Intl to Carlsbad was viewed by 111 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Boston to Carlsbad?

    For as low as $179, JetBlue can have you in Carlsbad from Boston in 6h 34m. Boston and Carlsbad are separated by a distance of 2603 mi. Most flights are nonstop.

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

    One-way options have recently been found by users for as low as $72 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $73 and Breeze Airways from $99 one-way.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to Carlsbad on time: Air China (94%), China Southern (88%), China Eastern (87%).

  • What are the cheapest flights from Boston to Carlsbad?

    On average you can expect to pay $1,060 for a flight from Boston to Carlsbad. The cheapest flight overall is $95 while the most popular route, (Boston Logan Intl - Los Angeles) is currently priced at $154.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Boston to Carlsbad (average of $115). Flying from Boston to Carlsbad in December is currently the most expensive (average of $179). 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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Alternative routes for Boston to Carlsbad

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Boston to Carlsbad

Discover the top 10 airlines that operate flights from Boston 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 December 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Breeze AirwaysCheapest$88Average$189FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$91Average$188FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$104Average$264FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$108Average$346FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$138Average$354FlexibilityNo cancel feeOn-time85%
DeltaCheapest$141Average$402FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$182Average$447FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$205Average$432FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$206Average$478FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$206Average$399FlexibilityNo cancel feeOn-time75%

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