What is the cheapest airline that flies from Portland to Kaua'i?

Southwest and Alaska Airlines are the most popular carriers operating from Portland to Kaua'i

How many flights depart from Portland to Kaua'i on average per week?

The number of flights available between Portland and Kaua'i is 7 per week as of May 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

How many flights depart from Portland to Kaua'i on average per day?

The number of flights available between Portland and Kaua'i is 1 per day as of May 2026. The most frequent departure time is 7:00AM, with 100% of daily flights leaving at noon.

What airlines fly to Kaua'i?

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Kaua'i from Portland according to our data. Alaska Airlines is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Kaua'i. Keep in mind that there are 8 different airlines that fly to Kaua'i on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Portland Airport to Kaua'i?

Prices for flights from Portland Airport to Kaua'i are updated daily.

How many operators does momondo search for flights from Portland Airport to Kaua'i?

There are 8 operators available for flights from Portland Airport to Kaua'i as of May 2026.

How old do you have to be to fly from Portland Airport to Kaua'i?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Kaua'i.

What documentation or ID do you need to fly to Kaua'i?

The required travel and health documents for your Kaua'i trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kaua'i. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$208 Cheap Flights from Portland to Kaua'i in 2026

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Find the cheapest flights from Portland to Kaua'i

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:20 am - 7:04 pm

PDX

LIH

10h 44m

1 stop

9:55 pm - 11:42 am

LIH

PDX

10h 47m

1 stop

$396Delta

Thu, Jun 4 - Tue, Jun 9

7:44 am - 11:02 am

PDX

LIH

6h 18mnonstop

12:02 pm - 8:37 pm

LIH

PDX

5h 35mnonstop

$397Alaska Airlines

Tue, Jun 2 - Thu, Jun 4

11:16 am - 7:42 pm

PDX

LIH

11h 26m

1 stop

1:17 pm - 12:50 am

LIH

PDX

8h 33m

1 stop

$406United Airlines

Tue, Jun 2 - Thu, Jun 4

7:05 am - 12:28 pm

PDX

LIH

8h 23m

1 stop

12:02 pm - 8:37 pm

LIH

PDX

5h 35mnonstop

$407Multiple Airlines

Tue, Jun 2 - Thu, Jun 4

7:44 am - 11:02 am

PDX

LIH

6h 18mnonstop

3:40 pm - 11:31 am

LIH

PDX

16h 51m

1 stop

$414Alaska Airlines

Wed, Jun 3 - Tue, Jun 9

1:14 pm - 7:42 pm

PDX

LIH

9h 28m

1 stop

1:17 pm - 12:50 am

LIH

PDX

8h 33m

1 stop

$416United Airlines

Tue, May 26 - Tue, Jun 2

5:15 am - 11:55 am

PDX

LIH

9h 40m

1 stop

10:44 pm - 10:20 am

LIH

PDX

8h 36m

1 stop

$417United Airlines

Mon, Jun 1 - Sun, Jun 7

5:10 am - 12:01 pm

PDX

LIH

9h 51m

1 stop

1:17 pm - 12:47 am

LIH

PDX

8h 30m

1 stop

$418United Airlines

Tue, Sep 15 - Wed, Sep 23

11:16 am - 7:42 pm

PDX

LIH

11h 26m

1 stop

10:44 pm - 10:20 am

LIH

PDX

8h 36m

1 stop

$420United Airlines

Wed, Jun 3 - Tue, Jun 9

5:15 am - 11:55 am

PDX

LIH

9h 40m

1 stop

10:44 pm - 12:09 pm

LIH

PDX

10h 25m

1 stop

$425United Airlines

Mon, Jun 1 - Mon, Jun 8

Alaska Airlines flights from Portland to Kaua'i

Our best Alaska Airlines deals on Portland to Kaua'i flight tickets

Alaska Airlines

Jun 2

PDX7:44 amPortland

6h 18m

LIH11:02 amLihue

Jun 4

LIH12:02 pmLihue

5h 35m

PDX8:37 pmPortland

$397

Alaska Airlines

Jun 3

PDX7:44 amPortland

6h 18m

LIH11:02 amLihue

Jun 9

LIH3:40 pmLihue

16h 51m

1 stop

PDX11:31 amPortland

$414

Alaska Airlines

Jun 8

PDX7:44 amPortland

6h 18m

LIH11:02 amLihue

Jun 8

LIH3:45 pmLihue

19h 05m

1 stop

PDX1:50 pmPortland

$453

United Airlines flights from Portland to Kaua'i

Our best United Airlines deals on Portland to Kaua'i flight tickets

United Airlines

May 29

PDX11:16 amPortland

11h 26m

1 stop

LIH7:42 pmLihue

Jun 2

LIH10:44 pmLihue

8h 36m

1 stop

PDX10:20 amPortland

$396

United Airlines

Jun 2

PDX11:16 amPortland

11h 26m

1 stop

LIH7:42 pmLihue

Jun 4

LIH1:17 pmLihue

8h 33m

1 stop

PDX12:50 amPortland

$406

United Airlines

May 26

PDX1:14 pmPortland

9h 28m

1 stop

LIH7:42 pmLihue

Jun 2

LIH1:17 pmLihue

8h 33m

1 stop

PDX12:50 amPortland

$416

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLihue

PDX - LIH

PDXLIH

Portland

Thu 6/4

11:20 am-7:04 pm

1 stop10h 44m

Lihue

Tue 6/9

9:55 pm-11:42 am

1 stop10h 47m

$396

Quickest round-trip

PortlandLihue

PDX - LIH

PDXLIH

Portland

Tue 6/2

7:44 am-11:02 am

Nonstop6h 18m

Lihue

Thu 6/4

12:02 pm-8:37 pm

Nonstop5h 35m

$397

PortlandLihue

PDX - LIH

PDXLIH

Portland

Tue 6/2

11:16 am-7:42 pm

1 stop11h 26m

Lihue

Thu 6/4

1:17 pm-12:50 am

1 stop8h 33m

$406

PortlandLihue

PDX - LIH

PDXLIH

Portland

Tue 6/2

7:05 am-12:28 pm

1 stop8h 23m

Lihue

Thu 6/4

12:02 pm-8:37 pm

Nonstop5h 35m

$407

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 6/3

7:44 am-11:02 am

Nonstop6h 18m

Lihue

Tue 6/9

3:40 pm-11:31 am

1 stop16h 51m

$414

PortlandLihue

PDX - LIH

PDXLIH

Portland

Tue 5/26

1:14 pm-7:42 pm

1 stop9h 28m

Lihue

Tue 6/2

1:17 pm-12:50 am

1 stop8h 33m

$416

PortlandLihue

PDX - LIH

PDXLIH

Portland

Mon 6/1

5:15 am-11:55 am

1 stop9h 40m

Lihue

Sun 6/7

10:44 pm-10:20 am

1 stop8h 36m

$417

PortlandLihue

PDX - LIH

PDXLIH

Portland

Tue 9/15

5:10 am-12:01 pm

1 stop9h 51m

Lihue

Wed 9/23

1:17 pm-12:47 am

1 stop8h 30m

$418

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 6/3

11:16 am-7:42 pm

1 stop11h 26m

Lihue

Tue 6/9

10:44 pm-10:20 am

1 stop8h 36m

$420

PortlandLihue

PDX - LIH

PDXLIH

Portland

Mon 6/1

5:15 am-11:55 am

1 stop9h 40m

Lihue

Mon 6/8

10:44 pm-12:09 pm

1 stop10h 25m

$425

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Kaua'i

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

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

In general, December is the cheapest month to fly from Portland to Kaua'i. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $112. The month of October is another great option to travel to Kaua'i, with average flight prices from Portland averaging around $138.

What is the cheapest day to depart on your flight to Kaua'i?

According to our data, Tuesday is the cheapest day to fly to Kaua'i from Portland. The lowest ticket price found for a Tuesday departure recently was $452. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $692. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kaua'i.

What is the cheapest Portland to Kaua'i flight route?

Fly from Portland to Lihue for the best Portland - Kaua'i flight prices

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

You are more likely to see cheaper flights to Kaua'i from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Kaua'i for around $558 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kaua'i from Portland for as low as $399 on momondo.

Cheap Portland to Kaua'i flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Kaua'i

Best Price Found	$404
Fastest flight time	5h 54m
Direct flights	Every day
Airports in Kaua'i	1 airport

The best one-way flight to Kaua'i from Portland in the past 72 hours is $404. The best round-trip flight deal from Portland to Kaua'i found on momondo in the last 72 hours is $592.

The fastest flight from Portland to Kaua'i takes 5h 54m

Direct flights go from Portland to Kaua'i every day.

There is 1 airport in Kaua'i. From Portland there are direct flights to Lihue (LIH).

Search flight deals

Frequently asked questions about flying from Portland to Kaua'i

When did momondo last update prices for flights from Portland Airport to Kaua'i?
Prices for flights from Portland Airport to Kaua'i are updated daily.
How many operators does momondo search for flights from Portland Airport to Kaua'i?
There are 8 operators available for flights from Portland Airport to Kaua'i as of May 2026.
How old do you have to be to fly from Portland Airport to Kaua'i?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Kaua'i.
What documentation or ID do you need to fly to Kaua'i?
The required travel and health documents for your Kaua'i trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kaua'i. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Portland to Kaua'i?
momondo data reveals that the most frequently booked plane model on the route from Portland to Kaua'i is Boeing 737-800 Passenger/BBJ2 (winglets), representing 20.83% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 13.57%, Boeing 737-800 at 8.93%, and Airbus A321neo at 8.64%.

Best airlines flying from Portland to Kaua'i

Compare and see reviews for airlines that fly from Portland to Kaua'i with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $181	Free Cancellation	Rating 7.9 8,454 reviews	Search Delta flights
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 9,727 reviews	Search United Airlines flights
American Airlines	PriceFrom $255	Free Cancellation	Rating 7.1 11,662 reviews	Search American Airlines flights
Southwest	PriceFrom $257	Free Cancellation	Rating 8.0 4,294 reviews	Search Southwest flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $358	Free Cancellation	Rating 7.9 12,370 reviews	Search Alaska Airlines flights
Alaska Airlines	PriceFrom $547	Free Cancellation	Rating 0.0	Search Alaska Airlines flights
JetBlue	PriceFrom $569	Free Cancellation	Rating 7.1 2,977 reviews	Search JetBlue flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Kaua'i?

It is quick and easy to find Portland to Kaua'i flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kaua'i that suits you.

Can I find flights from Portland to Kaua'i with flexible booking policies on momondo?

momondo does allow users to show only those flights to Kaua'i from Portland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Portland to Kaua'i?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kaua'i from Portland.

I’m not ready to book a flight from Portland to Kaua'i right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Kaua'i from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.