In terms of precipitation, rainfall in Tongatapu ranges from 3.7 - 8.3 inches per month. February is typically the wettest month, when rainfall can reach 8.3 in. June is typically the driest time to visit Tongatapu when rainfall is around 3.7 in.

If weather is an important factor for your trip to Tongatapu, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 71.6 F).

What is the cheapest time of day to fly from IAD to TT?

When flying from Washington, D.C. Dulles Intl Airport to Tongatapu, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Dulles Intl to Tongatapu that include hotel bookings?

Yes. In addition to deals on Dulles Intl to Tongatapu flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Dulles Intl to Tongatapu?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Tongatapu.

Can I find deals for business class flights from Dulles Intl to Tongatapu?

Yes. Cheapflights offers flight deals from Dulles Intl to Tongatapu by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$10,091+ Flights from Washington, D.C. Dulles Intl Airport to Tongatapu

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Cheap flight deals from Dulles Intl to Tongatapu

Round-trip from	$10,091 (oojo)

From Washington, D.C. Dulles Intl to Tongatapu

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Cheapest flights from Dulles Intl to Tongatapu
Explore the most affordable flight options available from Dulles Intl to Tongatapu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Sat 9/278:50 amIAD - TBU

2 stops32h 20mAir New Zealand

Wed 10/81:35 pmTBU - IAD

2 stops25h 31mAir New Zealand

Deal found 7/1

$10,091

Sat 9/275:22 pmIAD - TBU

3 stops54h 03mMultiple Airlines

Wed 10/81:35 pmTBU - IAD

2 stops34h 17mMultiple Airlines

Deal found 7/1

$16,078

Best flights from Dulles Intl to Tongatapu
Discover carefully curated flight deals from Dulles Intl to Tongatapu that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Sat 9/278:50 amIAD - TBU

2 stops32h 20mAir New Zealand

Wed 10/81:35 pmTBU - IAD

2 stops25h 31mAir New Zealand

Deal found 7/1

$10,091

Sat 9/275:22 pmIAD - TBU

3 stops54h 03mMultiple Airlines

Wed 10/81:35 pmTBU - IAD

2 stops34h 17mMultiple Airlines

Deal found 7/1

$16,078

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Tongatapu that are best for you.

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Route

Depart

Return

Price

Washington, D.C.Nuku‘alofa

IAD - TBU

IADTBU

Washington, D.C. Dulles Intl

Sat 9/27

8:50 am-10:10 am

2 stops32h 20m

Nuku‘alofa Fua'Amotu Intl

Wed 10/8

1:35 pm-10:06 pm

2 stops25h 31m

$10,091

Washington, D.C.Nuku‘alofa

IAD - TBU

IADTBU

Washington, D.C. Dulles Intl

Sat 9/27

5:22 pm-4:25 pm

3 stops54h 03m

Nuku‘alofa Fua'Amotu Intl

Wed 10/8

1:35 pm-6:52 am

2 stops34h 17m

$16,078

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Deals found on 7/1

Best time to book a flight from Dulles Intl to Tongatapu

Have a flexible travel schedule? Discover the best time to fly to Tongatapu from Dulles Intl with our price prediction graph.

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 Washington, D.C. Dulles Intl Airport to Tongatapu

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Reviews of airlines servicing Tongatapu

See what other customers who have flown with Air New Zealand from Washington, D.C. Dulles Intl Airport to Tongatapu have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air New Zealand

8.0

Very good

486 reviews

Reviews

1 / 20

6.0

Good

Anonymous,May 2025

AKL - SFO

It was a United plane, the seating was too tight.

Air New Zealand

8.0

Very good

486 reviews

Air New Zealand

8.0

Very good

486 reviews

Reviews

1 / 20

6.0

Good

Anonymous,May 2025

AKL - SFO

It was a United plane, the seating was too tight.

Related info for your journey

Can I find deals for flights from Dulles Intl to Tongatapu that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Tongatapu flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Tongatapu?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Tongatapu.
Can I find deals for business class flights from Dulles Intl to Tongatapu?
Yes. Cheapflights offers flight deals from Dulles Intl to Tongatapu by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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$10,091+ Cheap flights from Dulles Intl (IAD) to Tongatapu

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Tongatapu with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Tongatapu

Keep the following information in mind while searching for Dulles Intl to Tongatapu flight deals. Data was last updated July 3, 2025.

Round-trip from

Find flight deals from Dulles Intl to Tongatapu

Cheapest flights from Dulles Intl to TongatapuExplore the most affordable flight options available from Dulles Intl to Tongatapu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Dulles Intl to Tongatapu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Tongatapu that are best for you.

Best time to book a flight from Dulles Intl to Tongatapu

Have a flexible travel schedule? Discover the best time to fly to Tongatapu from Dulles Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Tongatapu

Reviews of airlines servicing Tongatapu

See what other customers who have flown with Air New Zealand from Washington, D.C. Dulles Intl Airport to Tongatapu have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Tongatapu. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Dulles Intl to Tongatapu that include hotel bookings?

How can I find direct flights from Dulles Intl to Tongatapu?

Can I find deals for business class flights from Dulles Intl to Tongatapu?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Tongatapu

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Cheapest flights from Dulles Intl to Tongatapu
Explore the most affordable flight options available from Dulles Intl to Tongatapu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.