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Kaua'i

$315+ Cheap flights from Boston (BOS) to Kaua'i

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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIH
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Boston to Kaua'i

Keep the following information in mind while searching for Boston to Kaua'i flight deals. Data was last updated July 31, 2025.

Round-trip from

$474
(Alaska Airlines)

One-way from

$315
(Alaska Airlines)

Popular in

July

Cheapest in

September

Average price

$997
From Boston Logan Intl to Kaua'i
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One-way flight from Boston Logan Intl to Kaua'i
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Highest demand for flights based on searches. 20% potential increase in price ($192 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Boston to Kaua'i

Cheapest flights from Boston to Kaua'i
Explore the most affordable flight options available from Boston to Kaua'i. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:59 pmBOS - LIH
1 stop20h 47mAlaska Airlines
Tue 11/187:12 pmLIH - BOS
2 stops15h 29mAlaska Airlines
Deal found 7/30$479
This Delta deal was found by Cheapflights users on 7/30. 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 10/296:15 amBOS - LIH
1 stop16h 38mDelta
Fri 11/710:40 pmLIH - BOS
1 stop12h 42mDelta
Deal found 7/30$526
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/307:30 amBOS - LIH
1 stop14h 06mUnited Airlines
Sun 9/712:57 pmLIH - BOS
1 stop13h 19mUnited Airlines
Deal found 7/29$567
This American Airlines deal was found by Cheapflights users on 7/31. 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 10/316:00 amBOS - LIH
1 stop14h 30mAmerican Airlines
Sun 11/92:49 pmLIH - BOS
2 stops14h 45mAmerican Airlines
Deal found 7/31$579

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Kaua'i 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 July 31, 2025.
Use the filters below to find and compare flights from Boston to Kaua'i that are best for you.

Fly from

Boston

Fly to

Kaua'i

Route

Depart

Return

Price

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Wed 10/29

6:15 am-4:53 pm

1 stop16h 38m

Lihue

Fri 11/7

10:40 pm-4:22 pm

1 stop12h 42m

$526

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Mon 9/22

8:23 pm-9:30 pm

2 stops31h 07m

Lihue

Sun 9/28

2:25 pm-8:00 am

2 stops35h 35m

$535

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sat 8/30

7:30 am-3:36 pm

1 stop14h 06m

Lihue

Sun 9/7

12:57 pm-8:16 am

1 stop13h 19m

$567

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sun 9/7

6:15 am-2:27 pm

1 stop14h 12m

Lihue

Fri 9/12

1:44 pm-10:18 am

2 stops14h 34m

$579

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sat 10/18

8:25 pm-1:32 pm

2 stops23h 07m

$315

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sat 8/16

6:15 am-1:56 pm

1 stop13h 41m

$316

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Mon 8/4

7:25 am-7:08 pm

1 stop17h 43m

$341

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sat 10/18

10:25 am-7:55 pm

1 stop15h 30m

$382

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Fri 8/8

8:00 am-3:38 pm

1 stop13h 38m

$420

BostonLihue

BOS - LIH

BOSLIH

Boston Logan Intl

Sun 8/10

9:20 pm-12:50 pm

2 stops21h 30m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Boston to Kaua'i

Have a flexible travel schedule? Discover the best time to fly to Kaua'i 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 Kaua'i

What is the cheapest month to book a flight from Boston to Kaua'i?

Currently, January is the cheapest month in which you can book a flight from Boston to Kaua'i (average of $440). Flying from Boston to Kaua'i in June is currently the most expensive (average of $689). 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 FUS?

Find hourly flight availability from Boston to Kaua'i. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Boston to Kaua'i, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Kaua'i

Get insights into the airlines that provide service to Kaua'i. 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 Kaua'i. Reviews last updated July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Boston to Kaua'i have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

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 Boston to Kaua'i. 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 Kaua'i?

    If you book a flight to Kaua'i 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.

  • What are the cheapest airlines to fly from Boston to Kaua'i one-way?

    One-way options have recently been found by users for as low as $315 on Alaska Airlines. Other airlines that offer cheap prices include American Airlines from $316 and Delta from $341 one-way.

  • Can I find deals for flights from Boston to Kaua'i that include hotel bookings?

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

  • How can I find direct flights from Boston to Kaua'i?

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

  • Can I find deals for business class flights from Boston to Kaua'i?

    Yes. Cheapflights offers flight deals from Boston to Kaua'i 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 Kaua'i?

    Currently, January is the cheapest month in which you can book a flight from Boston to Kaua'i (average of $440). Flying from Boston to Kaua'i in June is currently the most expensive (average of $689). 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

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Top 6 airlines flying from Boston to Kaua'i

Discover the top 6 airlines that operate flights from Boston to Kaua'i. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$314Average$584FlexibilityNo cancel feeOn-time62%
DeltaCheapest$352Average$738FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$369Average$653FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$417Average$628FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$444Average$629FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$448Average$875FlexibilityNo cancel feeOn-time69%

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