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Cheap flights from Washington, D.C. Dulles Intl Airport to São Tomé from $1,968

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to São Tomé departing on 3/16. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to São Tomé

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:50 pm - 5:40 pm
IAD
-
TMS
15h 50m2 stops
Multiple Airlines Logo
1:10 pm - 8:55 am
TMS
-
IAD
47h 45m3 stops
$1,968Multiple Airlines
Mon, Mar 16 - Mon, Mar 30
Multiple Airlines Logo
11:00 am - 5:40 pm
IAD
-
TMS
26h 40m3 stops
Multiple Airlines Logo
1:10 pm - 8:55 am
TMS
-
IAD
47h 45m3 stops
$2,013Multiple Airlines
Mon, Mar 16 - Mon, Mar 30
Multiple Airlines Logo
11:05 pm - 6:05 pm
IAD
-
TMS
39h 00m2 stops
Multiple Airlines Logo
1:10 pm - 3:05 pm
TMS
-
IAD
29h 55m2 stops
$5,254Multiple Airlines
Mon, Mar 16 - Mon, Mar 30

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to São Tomé

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to São Tomé flight tickets
TAP AIR PORTUGAL
Jan 29
IAD5:30 pmWashington, D.C. Dulles Intl
19h 35m
2 stops
TMS6:05 pmSao Tome Is
Feb 11
TMS8:00 pmSao Tome Is
24h 15m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
$3,377
Find similar
TAP AIR PORTUGAL
Jan 30
IAD10:30 pmWashington, D.C. Dulles Intl
38h 35m
2 stops
TMS6:05 pmSao Tome Is
Feb 11
TMS8:00 pmSao Tome Is
24h 15m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
$3,384
Find similar
TAP AIR PORTUGAL
Jan 29
IAD5:30 pmWashington, D.C. Dulles Intl
19h 35m
2 stops
TMS6:05 pmSao Tome Is
Feb 14
TMS10:25 pmSao Tome Is
27h 35m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
$3,724
Find similar

Ethiopian Air flights from Washington, D.C. Dulles Intl Airport to São Tomé

Our best Ethiopian Air deals on Washington, D.C. Dulles Intl Airport to São Tomé flight tickets
Ethiopian Air
Feb 2
IAD10:00 amWashington, D.C. Dulles Intl
26h 40m
3 stops
TMS5:40 pmSao Tome Is
Feb 11
TMS7:00 amSao Tome Is
30h 00m
4 stops
IAD8:00 amWashington, D.C. Dulles Intl
$5,268
Find similar
Ethiopian Air
Feb 2
IAD8:50 pmWashington, D.C. Dulles Intl
15h 50m
2 stops
TMS5:40 pmSao Tome Is
Feb 11
TMS7:00 amSao Tome Is
30h 00m
4 stops
IAD8:00 amWashington, D.C. Dulles Intl
$5,506
Find similar
Ethiopian Air
Feb 2
IAD10:00 amWashington, D.C. Dulles Intl
26h 40m
3 stops
TMS5:40 pmSao Tome Is
Feb 11
TMS7:00 amSao Tome Is
17h 05m
2 stops
IAD7:05 pmWashington, D.C. Dulles Intl
$5,515
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to São Tomé 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, momondo users made 832,500 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to São Tomé that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Mon 3/16

9:50 pm-5:40 pm

2 stops15h 50m

Sao Tome Is

Mon 3/30

1:10 pm-8:55 am

3 stops47h 45m

$1,968

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Mon 3/16

11:00 am-5:40 pm

3 stops26h 40m

Sao Tome Is

Mon 3/30

1:10 pm-8:55 am

3 stops47h 45m

$2,013

Washington, D.C.São Tomé

IAD - TMS

IADTMS

Washington, D.C. Dulles Intl

Mon 3/16

11:05 pm-6:05 pm

2 stops39h 00m

Sao Tome Is

Mon 3/30

1:10 pm-3:05 pm

2 stops29h 55m

$5,254

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Washington, D.C. Dulles Intl Airport to São Tomé

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to São Tomé according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to São Tomé (IAD to TMS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to São Tomé

Fastest flight time

15h 50m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to São Tomé takes 15h 50m
There are no direct flights from Washington, D.C. Dulles Intl Airport to São Tomé. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to São Tomé.
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  • How far is Washington, D.C. Dulles Intl to Sao Tome Is by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to Sao Tome Is is 5886.9 mi. Typically, this will take 15h 50m by plane in normal conditions.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport are updated daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Sao Tome Is Airport.

  • What documentation or ID do you need to fly to Sao Tome Is Airport?

    The required travel and health documents for your Sao Tome Is Airport 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 Sao Tome Is Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to São Tomé?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from São Tomé. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to São Tomé with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to São Tomé?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to São Tomé. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to São Tomé with flexible booking policies on momondo?

Yes. All flights to São Tomé from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to São Tomé?

momondo helps you find the best flight between Washington, D.C. and São Tomé by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to São Tomé right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to São Tomé now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to São Tomé and let you know when they change.

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