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

United Airlines 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 July 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 July 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 74% of people opting to fly with this airline when traveling to Kaua'i. Keep in mind that there are 7 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 7 operators available for flights from Portland Airport to Kaua'i as of July 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.

$188 Cheap Flights from Portland to Kaua'i in 2026

Discover deals from 900+ travel sites with momondo.

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.

11:15 am - 7:44 pm

PDX

LIH

11h 29m

1 stop

10:48 pm - 12:00 pm

LIH

PDX

10h 12m

1 stop

$316United Airlines

Thu, Aug 27 - Mon, Aug 31

5:30 am - 12:31 pm

PDX

LIH

9h 01m

1 stop

11:59 pm - 12:01 pm

LIH

PDX

10h 02m

1 stop

$337United Airlines

Wed, Nov 4 - Mon, Nov 16

5:30 am - 12:31 pm

PDX

LIH

9h 01m

1 stop

11:59 pm - 12:01 pm

LIH

PDX

10h 02m

1 stop

$339United Airlines

Wed, Nov 4 - Mon, Nov 16

1:03 pm - 7:44 pm

PDX

LIH

9h 41m

1 stop

11:00 pm - 10:15 am

LIH

PDX

8h 15m

1 stop

$340United Airlines

Thu, Oct 1 - Mon, Oct 12

5:30 am - 11:29 am

PDX

LIH

8h 59m

1 stop

12:46 pm - 12:35 am

LIH

PDX

8h 49m

1 stop

$341United Airlines

Thu, Oct 22 - Tue, Oct 27

5:30 am - 11:59 am

PDX

LIH

9h 29m

1 stop

1:15 pm - 12:37 am

LIH

PDX

8h 22m

1 stop

$342United Airlines

Wed, Aug 26 - Mon, Aug 31

11:15 am - 7:44 pm

PDX

LIH

11h 29m

1 stop

10:48 pm - 10:11 am

LIH

PDX

8h 23m

1 stop

$346United Airlines

Thu, Aug 27 - Sun, Aug 30

5:00 am - 4:10 pm

PDX

LIH

14h 10m

1 stop

9:25 pm - 10:15 am

LIH

PDX

9h 50m

1 stop

$356Southwest

Mon, Aug 24 - Thu, Aug 27

7:20 am - 4:15 pm

PDX

LIH

10h 55m

1 stop

9:05 pm - 10:55 am

LIH

PDX

11h 50m

2 stops

$362Southwest

Wed, Nov 4 - Mon, Nov 16

2:45 pm - 3:13 pm

PDX

LIH

27h 28m

1 stop

11:25 am - 7:50 pm

LIH

PDX

5h 25mnonstop

$364Multiple Airlines

Mon, Aug 24 - Tue, Sep 1

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Alaska Airlines flights from Portland to Kaua'i

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

Alaska Airlines

Nov 4

PDX7:50 amPortland

6h 19m

LIH12:09 pmLihue

Nov 12

LIH12:18 pmLihue

5h 31m

PDX7:49 pmPortland

$377

Alaska Airlines

Nov 10

PDX7:50 amPortland

6h 19m

LIH12:09 pmLihue

Nov 18

LIH7:21 pmLihue

19h 12m

1 stop

PDX4:33 pmPortland

$382

Alaska Airlines

Oct 28

PDX8:00 amPortland

10h 38m

1 stop

LIH3:38 pmLihue

Nov 11

LIH8:45 pmLihue

17h 48m

1 stop

PDX4:33 pmPortland

$387

Delta flights from Portland to Kaua'i

Our best Delta deals on Portland to Kaua'i flight tickets

Delta

Sep 30

PDX12:40 pmPortland

9h 30m

1 stop

LIH7:10 pmLihue

Oct 20

LIH9:50 pmLihue

11h 19m

1 stop

PDX12:09 pmPortland

$396

Delta

Nov 3

PDX11:25 amPortland

10h 49m

1 stop

LIH8:14 pmLihue

Nov 15

LIH10:26 pmLihue

9h 05m

1 stop

PDX9:31 amPortland

$426

Delta

Jul 15

PDX12:23 pmPortland

9h 35m

1 stop

LIH6:58 pmLihue

Jul 22

LIH9:55 pmLihue

9h 40m

1 stop

PDX10:35 amPortland

$562

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLihue

PDX - LIH

PDXLIH

Portland

Thu 8/27

11:15 am-7:44 pm

1 stop11h 29m

Lihue

Mon 8/31

10:48 pm-12:00 pm

1 stop10h 12m

$316

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 11/4

5:30 am-12:31 pm

1 stop9h 01m

Lihue

Mon 11/16

11:59 pm-12:01 pm

1 stop10h 02m

$337

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 11/4

5:30 am-12:31 pm

1 stop9h 01m

Lihue

Mon 11/16

11:59 pm-12:01 pm

1 stop10h 02m

$339

PortlandLihue

PDX - LIH

PDXLIH

Portland

Thu 10/1

1:03 pm-7:44 pm

1 stop9h 41m

Lihue

Mon 10/12

11:00 pm-10:15 am

1 stop8h 15m

$340

Quickest round-trip

PortlandLihue

PDX - LIH

PDXLIH

Portland

Thu 10/22

5:30 am-11:29 am

1 stop8h 59m

Lihue

Tue 10/27

12:46 pm-12:35 am

1 stop8h 49m

$341

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 8/26

5:30 am-11:59 am

1 stop9h 29m

Lihue

Mon 8/31

1:15 pm-12:37 am

1 stop8h 22m

$342

PortlandLihue

PDX - LIH

PDXLIH

Portland

Thu 8/27

11:15 am-7:44 pm

1 stop11h 29m

Lihue

Sun 8/30

10:48 pm-10:11 am

1 stop8h 23m

$346

PortlandLihue

PDX - LIH

PDXLIH

Portland

Mon 8/24

5:00 am-4:10 pm

1 stop14h 10m

Lihue

Thu 8/27

9:25 pm-10:15 am

1 stop9h 50m

$356

PortlandLihue

PDX - LIH

PDXLIH

Portland

Wed 11/4

7:20 am-4:15 pm

1 stop10h 55m

Lihue

Mon 11/16

9:05 pm-10:55 am

2 stops11h 50m

$362

PortlandLihue

PDX - LIH

PDXLIH

Portland

Mon 8/24

2:45 pm-3:13 pm

1 stop27h 28m

Lihue

Tue 9/1

11:25 am-7:50 pm

Nonstop5h 25m

$364

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 $459. 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 Friday because tickets tend to average around $702. 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 $571 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 $430 on momondo.

What cabin class options are available on Portland to Kaua'i flights?

There are 4 cabin classes available to choose from on Portland to Kaua'i flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to Kaua'i flights?

No. A direct flight is the cheapest option for a flight between Portland to Kaua'i.

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	$638
Fastest flight time	5h 54m
Direct flights	Every day
Airports in Kaua'i	1 airport

The best flight deal from Portland to Kaua'i found on momondo in the last 72 hours is $638

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 7 operators available for flights from Portland Airport to Kaua'i as of July 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 20.08% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 12.07%, Boeing 737-800 at 8.80%, and Airbus A321neo at 8.37%.

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 $200	Free Cancellation	Rating 7.8 8,452 reviews	Search Delta flights
United Airlines	PriceFrom $216	Free Cancellation	Rating 7.4 9,926 reviews	Search United Airlines flights
American Airlines	PriceFrom $217	Free Cancellation	Rating 7.1 11,769 reviews	Search American Airlines flights
Southwest	PriceFrom $256	Free Cancellation	Rating 7.9 4,249 reviews	Search Southwest flights
Hawaiian Airlines	PriceFrom $282	Free Cancellation	Rating 7.8 2,825 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $356	Free Cancellation	Rating 7.9 12,605 reviews	Search Alaska Airlines flights
JetBlue	PriceFrom $569	Free Cancellation	Rating 7.1 3,008 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.

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Flights to New Yorkfrom $53

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Flights to San Franciscofrom $56

Flights to Las Vegasfrom $50

Flights to Washington, D.C.from $53

Flights to Bostonfrom $88

Flights to Atlantafrom $56

Flights to Fort Lauderdalefrom $59

Flights to Dallasfrom $50

Cheap flights from Portland to Kaua'i from $188

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Kaua'i departing on 8/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Alaska Airlines flights from Portland to Kaua'i

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

Delta flights from Portland to Kaua'i

Our best Delta deals on Portland to Kaua'i flight tickets

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

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

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

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

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

What cabin class options are available on Portland to Kaua'i flights?

Can stopping save me money on Portland to Kaua'i flights?

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

What airlines fly to Kaua'i?

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

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

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

Fastest flight time

Direct flights

Airports in Kaua'i

Frequently asked questions about flying from Portland to Kaua'i

Best airlines flying from Portland to Kaua'i

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

Why use momondo?

An easier way to manage your Kaua'i trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Kaua'i

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