$277+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIH
Sep 26 — Oct 31
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Kaua'i with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Boston to Kaua'i
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One-way
Cheapest flights from Boston to Kaua'iExplore 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 August 27, 2026.
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 August 27, 2026.
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 11/1710:40 am -
1 stop14h 27m
Tue 11/249:45 pm -
1 stop13h 15m
Deal found 8/24![Delta logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/89:03 am -
1 stop32h 06m
Mon 11/164:22 pm -
2 stops19h 55m
Deal found 8/25![Multiple Airlines logo]()
$613
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 11/176:05 am -
2 stops17h 36m
Thu 11/199:45 pm -
1 stop13h 15m
Deal found 8/24![Delta logo]()
$614
This American Airlines deal was found by Cheapflights users on 8/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:01 am -
2 stops16h 18m
Tue 11/242:53 pm -
2 stops14h 29m
Deal found 8/24![American Airlines logo]()
$617
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:17 pm -
2 stops26h 56m
Mon 9/147:12 am -
2 stops18h 27m
Deal found 8/26![Multiple Airlines logo]()
$618
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:59 pm -
2 stops25h 14m
Sun 9/276:00 am -
2 stops18h 09m
Deal found 8/24![Multiple Airlines logo]()
$619
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:45 pm -
1 stop25h 21m
Wed 12/91:59 pm -
1 stop13h 03m
Deal found 8/24![Alaska Airlines logo]()
$645
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Tue 9/17:45 am -
1 stop13h 55m
Sun 9/61:00 pm -
1 stop12h 53m
Deal found 8/26![United Airlines logo]()
$650
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:45 pm -
1 stop25h 21m
Wed 12/96:32 pm -
2 stops17h 14m
Deal found 8/24![Multiple Airlines logo]()
$651
Best flights from Boston to Kaua'iDiscover carefully curated flight deals from Boston to Kaua'i that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
Discover carefully curated flight deals from Boston to Kaua'i that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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.
Thu 1/286:14 pm -
1 stop26h 21m
Tue 2/210:32 am -
1 stop25h 31m
Deal found 8/22![Alaska Airlines logo]()
$607
This Delta deal was found by Cheapflights users on 8/23. 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.
Thu 1/287:05 am -
1 stop18h 17m
Tue 2/210:26 pm -
1 stop13h 04m
Deal found 8/23![Delta logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 8/22. 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.
Thu 1/286:14 pm -
1 stop26h 21m
Tue 2/24:22 pm -
2 stops19h 41m
Deal found 8/22![Multiple Airlines logo]()
$613
This American Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 12/318:00 am -
2 stops15h 41m
Thu 1/142:15 pm -
2 stops15h 18m
Deal found 8/26![American Airlines logo]()
$619
This Delta deal was found by Cheapflights users on 8/22. 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.
Fri 10/3010:50 am -
1 stop14h 24m
Sat 11/79:45 pm -
1 stop12h 25m
Deal found 8/22![Delta logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:59 pm -
2 stops26h 31m
Sun 9/2711:25 am -
1 stop12h 44m
Deal found 8/25![Multiple Airlines logo]()
$614
This Delta deal was found by Cheapflights users on 8/24. 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.
Sat 9/195:55 am -
2 stops17h 44m
Sun 9/278:45 pm -
1 stop12h 29m
Deal found 8/24![Delta logo]()
$614
Last-minute flights from Boston to Kaua'iDiscover last-minute flight deals from Boston to Kaua'i. Data last updated August 27, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Kaua'i. Data last updated August 27, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/23. 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.
Thu 8/277:45 am -
1 stop13h 55m
Sat 8/297:35 pm -
1 stop14h 21m
Deal found 8/23![United Airlines logo]()
$661
This Orbitz deal was found by Cheapflights users on 8/23. 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.
Thu 8/279:33 am -
2 stops18h 24m
Sat 8/297:12 am -
2 stops16h 57m
Deal found 8/23![Alaska Airlines logo]()
$694
This American Airlines deal was found by Cheapflights users on 8/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:30 am -
1 stop14h 25m
Sun 8/309:00 pm -
1 stop20h 24m
Deal found 8/24![American Airlines logo]()
$666
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Tue 9/17:45 am -
1 stop13h 55m
Sun 9/61:00 pm -
1 stop12h 53m
Deal found 8/26![United Airlines logo]()
$650
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:50 am -
1 stop12h 51m
Mon 9/78:41 pm -
1 stop12h 33m
Deal found 8/26![Delta logo]()
$686
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:59 pm -
1 stop24h 43m
Mon 9/1410:31 am -
2 stops15h 08m
Deal found 8/26![Multiple Airlines logo]()
$613
This Delta deal was found by Cheapflights users on 8/24. 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.
Sat 9/197:55 am -
1 stop17h 15m
Sun 9/279:54 pm -
1 stop11h 59m
Deal found 8/24![Delta logo]()
$608
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:59 pm -
2 stops25h 14m
Sun 9/276:00 am -
2 stops18h 09m
Deal found 8/24![Multiple Airlines logo]()
$619
One-way flights from Boston to Kaua'iSearch for one-way flight options from Boston to Kaua'i. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
Search for one-way flight options from Boston to Kaua'i. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
This Southwest deal was found by Cheapflights users on 8/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/115:05 am -
2 stops16h 15m
Deal found 8/24![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 8/25. 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.
Tue 9/157:55 am -
1 stop17h 15m
Deal found 8/25![Delta logo]()
$304
This Expedia deal was found by Cheapflights users on 8/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/94:56 pm -
1 stop24h 48m
Deal found 8/24![Multiple Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 8/24. 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.
Tue 9/86:05 am -
2 stops19h 05m
Deal found 8/24![Delta logo]()
$315
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2011:44 am -
1 stop13h 26m
Deal found 8/26![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 8/24. 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.
Mon 9/149:20 pm -
2 stops26h 19m
Deal found 8/24![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/126:14 pm -
1 stop26h 21m
Deal found 8/24![Alaska Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Mon 9/147:45 am -
1 stop13h 55m
Deal found 8/22![United Airlines logo]()
$349
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/126:14 pm -
2 stops26h 36m
Deal found 8/24![Multiple Airlines logo]()
$351
This American Airlines deal was found by Cheapflights users on 8/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/96:25 pm -
1 stop23h 12m
Deal found 8/24![American Airlines logo]()
$362
This Booking.com deal was found by Cheapflights users on 8/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/156:14 pm -
2 stops26h 00m
Deal found 8/24![Multiple Airlines logo]()
$370
Find 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 August 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $607 (Alaska Airlines) |
One-way from | $277 (Southwest) |
Popular in | December |
Cheapest in | September |
Average price | $669 |
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 7,457,451 searches. Data last updated August 27, 2026.
Use the filters below to find and compare flights from Boston to Kaua'i that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Thu 1/28
6:14 pm-3:35 pm
1 stop26h 21m
Lihue
Tue 2/2
10:32 am-5:03 pm
1 stop25h 31m
$607
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Thu 1/28
7:05 am-8:22 pm
1 stop18h 17m
Lihue
Tue 2/2
10:26 pm-4:30 pm
1 stop13h 04m
$608
Quickest round-trip
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Fri 10/30
10:50 am-7:14 pm
1 stop14h 24m
Lihue
Sat 11/7
9:45 pm-3:10 pm
1 stop12h 25m
$608
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Thu 1/28
6:14 pm-3:35 pm
1 stop26h 21m
Lihue
Tue 2/2
4:22 pm-5:03 pm
2 stops19h 41m
$613
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Sat 9/19
7:59 pm-4:30 pm
2 stops26h 31m
Lihue
Sun 9/27
11:25 am-6:09 am
1 stop12h 44m
$614
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Sat 9/19
5:55 am-5:39 pm
2 stops17h 44m
Lihue
Sun 9/27
8:45 pm-3:14 pm
1 stop12h 29m
$614
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Thu 12/31
8:00 am-6:41 pm
2 stops15h 41m
Lihue
Thu 1/14
2:15 pm-10:33 am
2 stops15h 18m
$619
Cheapest one-way
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Fri 10/2
7:55 am-7:10 pm
1 stop17h 15m
$304
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Sat 9/12
7:55 am-7:10 pm
1 stop17h 15m
$304
BostonLihue
BOS Boston Logan Intl - LIH Lihue
BOSLIH
Boston Logan Intl
Wed 9/2
10:50 am-5:41 pm
1 stop12h 51m
$304
Showing 1-10 of 16 resultsSorted by cheapest first
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.
BOS-LIH
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
BOS-zzFUS
BOS-LIH
What is the cheapest month to book a flight from Boston to Kaua'i?
Currently, September is the cheapest month in which you can book a flight from Boston to Kaua'i (average of $644). Flying from Boston to Kaua'i in December is currently the most expensive (average of $1,022). 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.
How far ahead should I book a flight from Boston to Kaua'i?
The best time to book flights from Boston to Kaua'i is 73 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 August 27, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andUnited Airlines 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.
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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.
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Complete your trip
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Search flights from Boston to Kaua'i by cabin class
Find flights from Boston to Kaua'i, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Kaua'i flights
Browse other Boston and Kaua'i flight options. Last updated on August 27, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Boston to Kaua'i
Discover the top 4 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 7,457,451 searches. Data last updated August 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$274 | Average$702 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$417 | Average$730 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$489 | Average$891 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$513 | Average$879 | FlexibilityNo cancel fee | On-time71% |