How long is the flight from Washington, D.C. Dulles Intl Airport to Tonga?

There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Tonga in 46h 25m. Fly via Air New Zealand to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Tonga is about 7523 mi.

In terms of precipitation, rainfall in Tonga 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 Tonga when rainfall is around 3.7 in.

If weather is an important factor for your trip to Tonga, 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 TO?

When flying from Washington, D.C. Dulles Intl Airport to Tonga, 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 Tonga that include hotel bookings?

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

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

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

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

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

$2,681+ Flights from Washington, D.C. Dulles Intl Airport to Tonga

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Find flight deals from Dulles Intl to Tonga

Best flights from Dulles Intl to Tonga
Discover carefully curated flight deals from Dulles Intl to Tonga that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2025.

Tue 2/105:45 pmIAD - TBU

2 stops46h 25mAir New Zealand

Sat 2/149:35 pmTBU - IAD

2 stops44h 21mAir New Zealand

Deal found 10/28

$2,681

Cheap flight deals from Dulles Intl to Tonga

Round-trip from	$2,681 (Air New Zealand)

From Washington, D.C. Dulles Intl to Tonga

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Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Tonga 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

Tue 2/10

5:45 pm-10:10 am

2 stops46h 25m

Nuku‘alofa Fua'Amotu Intl

Sat 2/14

9:35 pm-11:56 pm

2 stops44h 21m

$2,681

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Best time to book a flight from Dulles Intl to Tonga

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

Estimated round-trip price

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

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Related info for your journey

How long is the flight from Washington, D.C. Dulles Intl Airport to Tonga?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Tonga in 46h 25m. Fly via Air New Zealand to get the fastest option. The distance between Washington, D.C. Dulles Intl Airport and Tonga is about 7523 mi.
Can I find deals for flights from Dulles Intl to Tonga that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Tonga flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Tonga?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Tonga.
Can I find deals for business class flights from Dulles Intl to Tonga?
Yes. Cheapflights offers flight deals from Dulles Intl to Tonga by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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