$274 Find Cheap Flights from Boston to Kaua'i

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Kaua'i departing on 10/21. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Kaua'i

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kaua'i, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kaua'i, as well as popular online travel agencies
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Flight Deals

Book Cheap Boston to Kaua'i Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Kaua'i 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 Boston to Kaua'i

Wed, Oct 21 - Mon, Nov 2
Delta Logo
11:00 am - 7:22 pm
BOS
-
LIH
14h 22m
1 stop
Delta Logo
9:26 pm - 7:31 pm
LIH
-
BOS
17h 05m
1 stop
$540Delta
Wed, Aug 26 - Fri, Sep 4
Delta Logo
8:35 pm - 5:41 pm
BOS
-
LIH
27h 06m
1 stop
Delta Logo
8:41 pm - 7:42 pm
LIH
-
BOS
17h 01m
2 stops
$545Delta
Tue, Aug 25 - Fri, Sep 4
Delta Logo
6:25 am - 5:41 pm
BOS
-
LIH
17h 16m
1 stop
Delta Logo
8:41 pm - 7:42 pm
LIH
-
BOS
17h 01m
2 stops
$546Delta
Tue, Nov 17 - Tue, Nov 24
Delta Logo
10:50 am - 8:22 pm
BOS
-
LIH
14h 32m
1 stop
Delta Logo
10:45 pm - 3:54 pm
LIH
-
BOS
12h 09m
1 stop
$548Delta
Wed, Oct 21 - Mon, Nov 2
Delta Logo
6:00 am - 7:22 pm
BOS
-
LIH
19h 22m
2 stops
Delta Logo
9:45 pm - 11:51 pm
LIH
-
BOS
21h 06m
2 stops
$551Delta
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
11:34 am - 7:44 pm
BOS
-
LIH
14h 10m
1 stop
United Airlines Logo
1:00 pm - 9:36 am
LIH
-
BOS
14h 36m
2 stops
$554United Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
8:27 am - 8:09 pm
BOS
-
LIH
17h 42m
2 stops
American Airlines Logo
12:59 pm - 9:37 am
LIH
-
BOS
14h 38m
2 stops
$559American Airlines
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
7:45 am - 3:40 pm
BOS
-
LIH
13h 55m
1 stop
United Airlines Logo
1:00 pm - 7:53 am
LIH
-
BOS
12h 53m
1 stop
$562United Airlines
Thu, Aug 20 - Tue, Aug 25
United Airlines Logo
7:45 am - 3:40 pm
BOS
-
LIH
13h 55m
1 stop
United Airlines Logo
1:00 pm - 7:53 am
LIH
-
BOS
12h 53m
1 stop
$563United Airlines
Tue, Sep 1 - Tue, Sep 15
United Airlines Logo
7:45 am - 3:40 pm
BOS
-
LIH
13h 55m
1 stop
United Airlines Logo
7:35 pm - 4:27 pm
LIH
-
BOS
14h 52m
2 stops
$567United Airlines
Booking Insights

KAYAK's insights & trends for Boston to Kaua'i flights

Get data-powered insights and trends into flights from Boston to Kaua'i to help you find the cheapest flights, the best time to fly and much more.

Can I save money by flying with a layover from Boston to Kaua'i?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $516, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Boston to Kaua'i?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Kaua'i, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Kaua'i is August, when tickets cost $264 (return) on average. On the other hand, the most expensive months are September and July, when the average cost of round-trip tickets is $573 and $553 respectively.

How far in advance should I book a flight from Boston to Kaua'i?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Kaua'i, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Kaua'i, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$274
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Boston to Lihue

FAQs - booking Kaua'i flights

  • How does KAYAK find such low prices on flights from Boston to Kaua'i?

    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 Boston to Kaua'i.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Boston to Kaua'i 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 Boston to Kaua'i?

    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 from Boston to Kaua'i with an airline and back with another airline.

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

    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 from Boston to Kaua'i up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Boston to Kaua'i

 
See real verified KAYAK customer reviews for airlines flying from Boston to Kaua'i. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Kaua'i? 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 12525 reviews
7.0Entertainment
8.5Crew
7.8Comfort
8.1Boarding
7.1Food
Airline reviews

Nice to get moved from a middle seat to an aisle seat upon request, but why wasn’t I put in an aisle seat to begin with? The flight was not full.

8.0 ExcellentDane, May 2026
BOS - PDX
Read more Alaska Airlines reviews

Nice to get moved from a middle seat to an aisle seat upon request, but why wasn’t I put in an aisle seat to begin with? The flight was not full.

The flight attendant and first class were very friendly, efficient, and wanted to make sure that service was great. Highly recommend this airline.

Comfortable seats, good drinks with lots of water refills, staff was kind and understanding of my disabled mother!

The crew seem untrained and uncertain no one ever checked up on us in our first class cabin. I had to ask for water four times and the lady kept saying she was busy when they weren't really doing anything. Had to walk to the back of the plane to get water for myself. Crew seem new and unexperience. You can tell this by the fumbling they kept making trying to fight. (I miss Hawaiian air.)

Our meal order was screwed up. We had to choose from basic boxes. I was not happy.

The merging of Kayak & the airline’s website was not always clear. Both on their own provided adequate Information about the flight. I had some challenges retrieving the boarding pass. I relied on the agent & may have paid the baggage fee twice.

Hello, Our flight arrived late, and the flight we were to connect to the departure time was moved up. At first our flight was scheduled to arrive at 10:40, but it arrived at 10:56. Our connecting flight was scheduled to leave at 11:25, and it was moved to 11:20. Also the terminal was moved from N to S. N would have been in the same terminal as the one we arrived in-- to get to S we had to take 3 trains to get to. And when we arrived at the gate, around 11:15, they said the gate was closed and would not open it. We had come from a funeral in Boston, and the person that helped us get new tickets said, "did you come from a girsl trip?" No, we did not. We were coming from a funeral. This experience was not what we expected/wanted. My friend, because she had to run to S, got a migraine and turned pale. In addition, I paid an extra $70 for an aisle seat that was more upfront, to make sure I can get off the plane faster and make the connecting flight. The fact that the plane not only did not wait, but left earlier, is absolutely unacceptable. This was a terrible experience, and I hope that I can be refunded for this horrible experience.

You can standby to get on earlier flight if the seat is open.

Boarding was easy and quick. Staff was very friendly. Service of snacks and drinks by staff was outstanding.

Generally very good. Waiting (due to de-icing and traffic) in plane to take off was a put-off. But it's not the airline's fault. I find Airbus more comfortable than Boeing.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

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.

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Trash. Sat on the runway for 40 mins…missed connecting flight because of it now I’m stuck. Thanks…a whole fkn lot.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

Awfully rude American worker at door when we started boarding flight. Then, walk into a blazing hot airplane with no air conditioning until twenty minutes into the flight. Free entertainment was non existent! My husband, along with the fellow passenger in our row, and I could not get entertainment to work, no WIFI! Really?? Been flying American a long time. Was very disappointed.

Flight was delayed by 6 hours... the level of incompetence was truly astounding. I won't be flying American Airlines again. I don't care if AA is direct and there is a layover with another airline, I'll take the layover.

Leave on time. We waited on the plane for hour hours and it was hot and smelly

Two hours delay, probably one hour because they didn’t bring catering and they had to bring water in board. There a change of aircraft. But delays galore at CLT so it must be a CLT and/or AA operation issue. The 1 hr additional delays because nobody could bring 2 packs of water sooner is probably the best example of this airline operates

Flight was delayed 5 hours. Initial reason for delay was 'maintenance' - which makes sense. Then, the additional 2 hours continued to say it was maintenance - when I know EWR had a 2 hour delay. AA did not say that. Additionally, when boarding, there was only one agent at the counter for a long time - until another came to help. After boarding, we had to wait another 45 minutes due to 'no catering'. So while we waited for catering, AA continued to board additional passengers - which seemed odd - and raised questions about what really was going on. I sat in First Class. During the flight, the flight crew allowed a significant number of non-First Class passengers to use the front bathroom - which created a very crowded environment in First Class which was uncomfortable. This also delayed First Class passengers from using the bathroom. Overall, horrible experience.

The Charleston, WV airport was cute. Very good staff and small enough to feel comfortable. The plane had more leg room than bigger planes. Much more comfortable.

Another uncoordinated American experience. Always surprises me at DFW for them of all places. Have to take this flight as there are no other good time options. We knew from the start that something was wrong, but the pilot wouldn't tell us. I just watched my Kayak app grow the delay by 10 minutes as it went to 3.5 hours. They were uncoordinated with maintenance (as maintenance, when finally arriving, knew within 15 minutes the plane wasn't going. No 'sorry' or 'this is what is going on' comment. The pilot seemed unfazed / didn't care about the process we were going through.

Everything you need to know for your flight to Kaua'i

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