$222+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LIH
May 2 — May 91
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
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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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Best
Last-minute
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 April 2, 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 April 2, 2026.
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 11/1711:00 am
BOS
- LIH
1 stop14h 22m
Delta
Tue 11/2410:45 pm
LIH
- BOS
1 stop16h 38m
Delta
Deal found 3/30![Delta logo]()
$508
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:40 am
BOS
- LIH
1 stop34h 04m
Multiple Airlines
Thu 9/176:00 am
LIH
- BOS
2 stops17h 49m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$513
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Tue 8/1810:30 am
BOS
- LIH
1 stop14h 36m
American Airlines
Tue 8/251:45 pm
LIH
- BOS
2 stops13h 47m
American Airlines
Deal found 3/31![American Airlines logo]()
$514
This Delta deal was found by Cheapflights users on 4/1. 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 8/185:40 am
BOS
- LIH
2 stops17h 32m
Delta
Tue 8/259:45 pm
LIH
- BOS
2 stops19h 32m
Delta
Deal found 4/1![Delta logo]()
$519
This Expedia deal was found by Cheapflights users on 4/1. 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.
Sun 5/35:56 pm
BOS
- LIH
1 stop26h 28m
Alaska Airlines
Fri 5/81:36 pm
LIH
- BOS
1 stop21h 17m
Alaska Airlines
Deal found 4/1![Alaska Airlines logo]()
$539
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:48 am
BOS
- LIH
1 stop17h 18m
Delta
Tue 5/269:55 pm
LIH
- BOS
2 stops19h 34m
Delta
Deal found 3/29![Delta logo]()
$542
This Expedia deal was found by Cheapflights users on 4/1. 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.
Sun 5/35:56 pm
BOS
- LIH
1 stop26h 28m
Multiple Airlines
Fri 5/83:44 pm
LIH
- BOS
2 stops19h 09m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$544
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 April 2, 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 April 2, 2026.
This Delta deal was found by Cheapflights users on 4/1. 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 9/17:05 am
BOS
- LIH
1 stop18h 15m
Delta
Thu 9/109:45 pm
LIH
- BOS
1 stop12h 15m
Delta
Deal found 4/1![Delta logo]()
$508
This Alaska Airlines deal was found by Cheapflights users on 3/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:40 am
BOS
- LIH
2 stops20h 14m
Multiple Airlines
Sun 9/276:00 am
LIH
- BOS
2 stops17h 49m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$585
This Delta deal was found by Cheapflights users on 4/1. 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 9/1911:00 am
BOS
- LIH
1 stop14h 20m
Delta
Sun 9/279:26 pm
LIH
- BOS
2 stops16h 19m
Delta
Deal found 4/1![Delta logo]()
$580
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:48 am
BOS
- LIH
1 stop17h 18m
Delta
Tue 5/199:55 pm
LIH
- BOS
1 stop11h 54m
Delta
Deal found 3/29![Delta logo]()
$610
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:40 am
BOS
- LIH
2 stops19h 23m
Delta
Wed 7/299:55 pm
LIH
- BOS
2 stops18h 52m
Delta
Deal found 3/31![Delta logo]()
$615
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:15 am
BOS
- LIH
2 stops18h 25m
Delta
Sun 4/199:25 pm
LIH
- BOS
1 stop12h 45m
Delta
Deal found 3/31![Delta logo]()
$686
This Delta deal was found by Cheapflights users on 3/28. 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 7/77:20 pm
BOS
- LIH
1 stop29h 43m
Delta
Tue 7/149:55 pm
LIH
- BOS
2 stops26h 10m
Delta
Deal found 3/28![Delta logo]()
$694
Last-minute flights from Boston to Kaua'iDiscover last-minute flight deals from Boston to Kaua'i. Data last updated April 2, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Kaua'i. Data last updated April 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/28. 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.
Mon 4/276:13 am
BOS
- LIH
1 stop15h 02m
American Airlines
Thu 5/72:12 pm
LIH
- BOS
1 stop11h 52m
American Airlines
Deal found 3/28![American Airlines logo]()
$508
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:15 am
BOS
- LIH
2 stops18h 25m
Delta
Thu 5/79:55 pm
LIH
- BOS
2 stops18h 56m
Delta
Deal found 3/31![Delta logo]()
$552
This Expedia deal was found by Cheapflights users on 4/1. 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.
Sun 5/35:56 pm
BOS
- LIH
1 stop26h 28m
Alaska Airlines
Fri 5/81:36 pm
LIH
- BOS
1 stop21h 17m
Alaska Airlines
Deal found 4/1![Alaska Airlines logo]()
$539
This Expedia deal was found by Cheapflights users on 4/1. 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.
Sun 5/35:56 pm
BOS
- LIH
1 stop26h 28m
Multiple Airlines
Fri 5/83:44 pm
LIH
- BOS
2 stops19h 09m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$544
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:10 am
BOS
- LIH
2 stops18h 56m
Delta
Tue 5/199:55 pm
LIH
- BOS
1 stop11h 54m
Delta
Deal found 3/29![Delta logo]()
$565
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/137:48 am
BOS
- LIH
1 stop17h 18m
Delta
Tue 5/269:55 pm
LIH
- BOS
2 stops19h 34m
Delta
Deal found 3/29![Delta logo]()
$542
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 April 2, 2026.
Search for one-way flight options from Boston to Kaua'i. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
This Delta deal was found by Cheapflights users on 4/1. 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 5/57:37 am
BOS
- LIH
1 stop16h 03m
Delta
Deal found 4/1![Delta logo]()
$222
This American Airlines deal was found by Cheapflights users on 3/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
BOS
- LIH
2 stops15h 15m
American Airlines
Deal found 3/29![American Airlines logo]()
$260
This American Airlines deal was found by Cheapflights users on 3/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:00 am
BOS
- LIH
2 stops15h 15m
American Airlines
Deal found 3/30![American Airlines logo]()
$280
This American Airlines deal was found by Cheapflights users on 4/1. 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 4/146:13 am
BOS
- LIH
1 stop15h 02m
American Airlines
Deal found 4/1![American Airlines logo]()
$289
This Southwest deal was found by Cheapflights users on 3/28. 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.
Wed 4/225:35 am
BOS
- LIH
2 stops16h 35m
Southwest
Deal found 3/28![Southwest logo]()
$293
This American Airlines deal was found by Cheapflights users on 3/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:00 am
BOS
- LIH
1 stop18h 06m
American Airlines
Deal found 3/30![American Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:48 am
BOS
- LIH
1 stop17h 18m
Delta
Deal found 3/31![Delta logo]()
$322
This Delta deal was found by Cheapflights users on 3/30. 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.
Tue 7/145:55 am
BOS
- LIH
2 stops17h 46m
Delta
Deal found 3/30![Delta logo]()
$328
This United Airlines deal was found by Cheapflights users on 4/1. 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 5/54:35 pm
BOS
- LIH
2 stops24h 53m
United Airlines
Deal found 4/1![United Airlines logo]()
$330
This Delta deal was found by Cheapflights users on 3/30. 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 7/82:52 pm
BOS
- LIH
2 stops34h 11m
Delta
Deal found 3/30![Delta logo]()
$333
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 April 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $508 (Delta) |
One-way from | $222 (Delta) |
Popular in | December |
Cheapest in | May |
Average price | $721 |
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 April 2, 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 - LIH
BOSLIH
Boston Logan Intl
Tue 9/1
7:05 am-7:20 pm
1 stop18h 15m
Lihue
Thu 9/10
9:45 pm-4:00 pm
1 stop12h 15m
$508
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Sat 9/19
11:00 am-7:20 pm
1 stop14h 20m
Lihue
Sun 9/27
9:26 pm-7:45 pm
2 stops16h 19m
$580
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Sat 9/19
7:40 am-9:54 pm
2 stops20h 14m
Lihue
Sun 9/27
6:00 am-5:49 am
2 stops17h 49m
$585
Quickest round-trip
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Tue 5/12
7:48 am-7:06 pm
1 stop17h 18m
Lihue
Tue 5/19
9:55 pm-3:49 pm
1 stop11h 54m
$610
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Tue 7/21
5:40 am-7:03 pm
2 stops19h 23m
Lihue
Wed 7/29
9:55 pm-10:47 pm
2 stops18h 52m
$615
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Wed 4/15
6:15 am-6:40 pm
2 stops18h 25m
Lihue
Sun 4/19
9:25 pm-4:10 pm
1 stop12h 45m
$686
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Tue 7/7
7:20 pm-7:03 pm
1 stop29h 43m
Lihue
Tue 7/14
9:55 pm-6:05 am
2 stops26h 10m
$694
Cheapest one-way
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Tue 5/5
7:37 am-5:40 pm
1 stop16h 03m
$222
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Wed 4/22
5:35 am-4:10 pm
2 stops16h 35m
$293
BostonLihue
BOS - LIH
BOSLIH
Boston Logan Intl
Wed 4/22
7:00 pm-12:22 pm
1 stop23h 22m
$367
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, April is the cheapest month in which you can book a flight from Boston to Kaua'i (average of $286). Flying from Boston to Kaua'i in July is currently the most expensive (average of $593). 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.
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 April 2, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andHawaiian 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.
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Comfort
7.8
Crew
8.5
Entertainment
7.0
Overall
7.9
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
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 April 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 April 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$370 | Average$746 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$431 | Average$996 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$489 | Average$693 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$509 | Average$869 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$528 | Average$854 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$584 | Average$661 | FlexibilityNo cancel fee | On-time62% |