$425+ Cheap flights from Washington 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SLP
Oct 31 — Nov 71
1 adult, Economy
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Find cheap flights from Washington to San Luis Potosí with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Washington to San Luis Potosí
Keep the following information in mind while searching for Washington to San Luis Potosí flight deals. Data was last updated October 1, 2025.
Round-trip from | $425 (Aeromexico) |
|---|---|
Popular in | December |
Cheapest in | May |
Average price | $1,150 |
Find flight deals from Washington to San Luis Potosí
Best flights from Washington to San Luis PotosíDiscover carefully curated flight deals from Washington to San Luis Potosí that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2025.
Discover carefully curated flight deals from Washington to San Luis Potosí that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 1, 2025.
This Aeromexico deal was found by Cheapflights users on 9/28. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:30 amGEG - SLP
2 stops26h 02mAeromexico
Thu 3/1210:08 amSLP - GEG
2 stops15h 12mAeromexico
Deal found 9/28![Aeromexico logo]()
$425
This American Airlines deal was found by Cheapflights users on 9/28. 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.
Tue 3/106:01 amGEG - SLP
1 stop15h 04mAmerican Airlines
Thu 3/125:19 amSLP - GEG
1 stop16h 15mAmerican Airlines
Deal found 9/28![American Airlines logo]()
$673
Cheapflights Fare Finder
Customize your flight search to find flights from Washington 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 October 1, 2025.
Use the filters below to find and compare flights from Washington to San Luis Potosí that are best for you.
Fly from
Washington
Fly to
San Luis Potosí
Route
Depart
Return
Price
SpokaneSan Luis Potosí
GEG - SLP
GEGSLP
Spokane
Tue 3/10
6:30 am-9:32 am
2 stops26h 02m
San Luis Potosi
Thu 3/12
10:08 am-12:20 am
2 stops15h 12m
$425
SpokaneSan Luis Potosí
GEG - SLP
GEGSLP
Spokane
Tue 3/10
6:01 am-10:05 pm
1 stop15h 04m
San Luis Potosi
Thu 3/12
5:19 am-8:34 pm
1 stop16h 15m
$673
Best time to book a flight from Washington to San Luis Potosí
Have a flexible travel schedule? Discover the best time to fly to San Luis Potosí from Washington 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 to San Luis Potosí
What is the cheapest month to book a flight from State of Washington to San Luis Potosí?
Currently, September is the cheapest month in which you can book a flight from State of Washington to San Luis Potosí (average of $391). Flying from State of Washington to San Luis Potosí in December is currently the most expensive (average of $855). 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.
What is the cheapest time of day to fly from WA to SLP?
Find hourly flight availability from Washington to San Luis Potosí. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 1, 2025.
When flying from State of Washington to San Luis Potosí, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Related info for your journey
Find useful and relevant information for your journey from Washington 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.
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Alternative routes for Washington to San Luis Potosí
See prices for flight routes from nearby airports that may be better suited for you.
Top 3 airlines flying from Washington to San Luis Potosí
Discover the top 3 airlines that operate flights from Washington 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 October 1, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$157 | Average$438 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$399 | Average$650 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$439 | Average$1,150 | FlexibilityNo cancel fee | On-time69% |