How long is the flight from St. Louis to Tonga?

For as low as $1,522, Fiji Airways can have you in Tonga from St. Louis in 36h 55m. The distance between St. Louis and Tonga is about 6852 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 STL to TO?

When flying from St. Louis 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.

What airport do you fly from for flights from St. Louis to Tonga?

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Tonga. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

Can I find deals for flights from St. Louis to Tonga that include hotel bookings?

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

How can I find direct flights from St. Louis to Tonga?

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

Can I find deals for business class flights from St. Louis to Tonga?

Yes. Cheapflights offers flight deals from St. Louis 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.

$1,522+ Flights from St. Louis to Tonga

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Cheap flight deals from St. Louis to Tonga

Best flights from St. Louis to Tonga
Discover carefully curated flight deals from St. Louis to Tonga that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 14, 2025.

Sat 2/215:55 pmSTL - TBU

2 stops36h 55mFiji Airways

Wed 2/255:40 amTBU - STL

2 stops37h 08mFiji Airways

Deal found 12/11

$1,522

Find flight deals from St. Louis to Tonga

Round-trip from	$1,522 (Fiji Airways)

From Lambert-St Louis to Tonga

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisNuku‘alofa

STL - TBU

STLTBU

Lambert-St Louis

Sat 2/21

5:55 pm-1:50 am

2 stops36h 55m

Nuku‘alofa Fua'Amotu Intl

Wed 2/25

5:40 am-11:48 pm

2 stops37h 08m

$1,522

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Best time to book a flight from St. Louis to Tonga

Have a flexible travel schedule? Discover the best time to fly to Tonga from St. Louis 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 St. Louis to Tonga

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from St. Louis to Tonga?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Tonga. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
How long is the flight from St. Louis to Tonga?
For as low as $1,522, Fiji Airways can have you in Tonga from St. Louis in 36h 55m. The distance between St. Louis and Tonga is about 6852 mi.
Can I find deals for flights from St. Louis to Tonga that include hotel bookings?
Yes. In addition to deals on St. Louis to Tonga flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Tonga?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Tonga.
Can I find deals for business class flights from St. Louis to Tonga?
Yes. Cheapflights offers flight deals from St. Louis 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.

See more FAQs

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$1,522+ Cheap flights from St. Louis (STL) to Tonga

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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.