$1,530+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — TBU
Apr 27 — May 41
1 adult, Economy
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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 April 22, 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 April 22, 2025.
This Fiji Airways deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/246:43 pmIAD - TBU
2 stops28h 02mMultiple Airlines
Tue 7/15:50 pmTBU - IAD
2 stops21h 49mMultiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$1,530
This KAYAK deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/243:35 pmIAD - TBU
2 stops26h 35mAir New Zealand
Thu 7/312:20 pmTBU - IAD
2 stops28h 38mAir New Zealand
Deal found 4/22![Air New Zealand logo]()
$1,883
This Fiji Airways deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/248:10 amIAD - TBU
2 stops38h 35mFiji Airways
Thu 7/34:45 pmTBU - IAD
2 stops31h 05mFiji Airways
Deal found 4/22![Fiji Airways logo]()
$1,896
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to Tongatapu that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Tongatapu that are best for you.
Fly from
Dulles Intl
Fly to
Tongatapu
Route
Depart
Return
Price
Washington, D.C.Nuku‘alofa
IAD - TBU
IADTBU
Washington, D.C. Dulles Intl
Tue 6/24
6:43 pm-3:45 pm
2 stops28h 02m
Nuku‘alofa Fua'Amotu Intl
Tue 7/1
5:50 pm-10:39 pm
2 stops21h 49m
$1,530
Washington, D.C.Nuku‘alofa
IAD - TBU
IADTBU
Washington, D.C. Dulles Intl
Tue 6/24
3:35 pm-11:10 am
2 stops26h 35m
Nuku‘alofa Fua'Amotu Intl
Thu 7/3
12:20 pm-11:58 pm
2 stops28h 38m
$1,883
Washington, D.C.Nuku‘alofa
IAD - TBU
IADTBU
Washington, D.C. Dulles Intl
Tue 6/24
8:10 am-3:45 pm
2 stops38h 35m
Nuku‘alofa Fua'Amotu Intl
Thu 7/3
4:45 pm-6:50 am
2 stops31h 05m
$1,896
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
Rainfall in Tongatapu by month
Plan your trip to Tongatapu by taking into account the average rainfall totals by month.
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.
Temperature in Tongatapu by month
Plan your trip to Tongatapu by taking into account the average temperature totals by month.
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).