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San Luis Potosí

$354+ Cheap flights from Dulles Intl (IAD) to San Luis Potosí, Mexico (SLP)

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SLP
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Dulles Intl to San Luis Potosí

Best flights from Dulles Intl to San Luis Potosí
Discover carefully curated flight deals from Dulles Intl to San Luis Potosí that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

This SmartFares deal was found by Cheapflights users on 12/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/103:15 pmIAD - SLP
1 stop9h 44mAeromexico
Tue 2/175:48 amSLP - IAD
1 stop6h 57mAeromexico
Deal found 12/27$354
This Delta deal was found by Cheapflights users on 12/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:09 pmIAD - SLP
1 stop7h 58mDelta
Wed 5/135:52 amSLP - IAD
1 stop7h 25mDelta
Deal found 12/27$361
This American Airlines deal was found by Cheapflights users on 12/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/27:01 amIAD - SLP
2 stops31h 30mAmerican Airlines
Sat 2/211:21 pmSLP - IAD
2 stops18h 22mAmerican Airlines
Deal found 12/25$397
This Delta deal was found by Cheapflights users on 12/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:09 pmIAD - SLP
1 stop7h 58mDelta
Wed 5/135:52 amSLP - IAD
1 stop7h 25mDelta
Deal found 12/27$361
This Delta deal was found by Cheapflights users on 12/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:09 pmIAD - SLP
1 stop8h 31mDelta
Wed 6/35:52 amSLP - IAD
1 stop7h 25mDelta
Deal found 12/27$361

Find flight deals from Dulles Intl to San Luis Potosí

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San Luis Potosí (SLP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$354
(SmartFares)

Popular in

December

Cheapest in

August

Average price

$774
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Luis Potosi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Luis Potosi flights.
Search Deals
From Washington, D.C. Dulles Intl to San Luis Potosi
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to San Luis Potosí 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 December 28, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Luis Potosí that are best for you.

Fly from

Dulles Intl

Fly to

San Luis Potosí

Route

Depart

Return

Price

Washington, D.C.San Luis Potosí

IAD - SLP

IADSLP

Washington, D.C. Dulles Intl

Tue 2/10

3:15 pm-11:59 pm

1 stop9h 44m

San Luis Potosi

Tue 2/17

5:48 am-1:45 pm

1 stop6h 57m

$354

Washington, D.C.San Luis Potosí

IAD - SLP

IADSLP

Washington, D.C. Dulles Intl

Wed 4/29

5:09 pm-11:07 pm

1 stop7h 58m

San Luis Potosi

Wed 5/13

5:52 am-3:17 pm

1 stop7h 25m

$361

Washington, D.C.San Luis Potosí

IAD - SLP

IADSLP

Washington, D.C. Dulles Intl

Wed 5/6

5:09 pm-11:07 pm

1 stop7h 58m

San Luis Potosi

Wed 5/13

5:52 am-3:17 pm

1 stop7h 25m

$361

Washington, D.C.San Luis Potosí

IAD - SLP

IADSLP

Washington, D.C. Dulles Intl

Thu 5/28

5:09 pm-11:40 pm

1 stop8h 31m

San Luis Potosi

Wed 6/3

5:52 am-3:17 pm

1 stop7h 25m

$361

Washington, D.C.San Luis Potosí

IAD - SLP

IADSLP

Washington, D.C. Dulles Intl

Mon 2/2

7:01 am-1:31 pm

2 stops31h 30m

San Luis Potosi

Sat 2/21

1:21 pm-8:43 am

2 stops18h 22m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Compare providers for flights from Dulles Intl to San Luis Potosí

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to San Luis Potosí in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
Trip.comPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Luis Potosí flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Luis Potosí flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Luis Potosí flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Luis Potosí flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San Luis Potosí flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to San Luis Potosí

Have a flexible travel schedule? Discover the best time to fly to San Luis Potosí 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 San Luis Potosí

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Luis Potosí?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Luis Potosí (average of $385). Flying from Washington, D.C. Dulles Intl Airport to San Luis Potosí in May is currently the most expensive (average of $910). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Luis Potosí

Get insights into the airlines that provide service to San Luis Potosí. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Luis Potosí. Reviews last updated December 28, 2025.
Peruse reviews from past customers who have flown with United Airlines from Washington, D.C. Dulles Intl Airport to San Luis Potosí to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,113 reviews
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

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

  • What airport do you fly into for flights to San Luis Potosí from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to San Luis Potosí, you will be flying into San Luis Potosi. San Luis Potosi (SLP) is just 7.8 mi from the center of the city. San Luis Potosi is the only San Luis Potosí airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to San Luis Potosi from Washington, D.C. Dulles Intl on a regular basis.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San Luis Potosí?

    Airlines like Aeromexico and Delta fly from Washington, D.C. Dulles Intl Airport to San Luis Potosí in about 7h 58m. The time it takes to get you to your destination can typically vary by up to 1h 46m. Washington, D.C. Dulles Intl Airport and San Luis Potosí are separated by a distance of 1800 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to San Luis Potosí round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to San Luis Potosí round-trip from $407.

  • Can I find deals for flights from Dulles Intl to San Luis Potosí that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to San Luis Potosí?

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

  • Can I find deals for business class flights from Dulles Intl to San Luis Potosí?

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

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Luis Potosí?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Luis Potosí (average of $385). Flying from Washington, D.C. Dulles Intl Airport to San Luis Potosí in May is currently the most expensive (average of $910). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Dulles Intl to San Luis Potosí

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to San Luis Potosí flights

Top airline flying from Dulles Intl to San Luis Potosí

Discover the top airline that operate flights from Dulles Intl to San Luis Potosí. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$407Average$550FlexibilityNo cancel feeOn-time69%

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