$402+ Cheap flights from San Antonio (SAT) to Porto (OPO)
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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — OPO
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio to Porto 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 San Antonio to Porto
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Best
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One-way
Cheapest flights from San Antonio to PortoExplore the most affordable flight options available from San Antonio to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from San Antonio to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/10. 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 11/1011:22 am -
2 stops18h 23m
Sun 11/158:20 am -
2 stops19h 59m
Deal found 9/10![American Airlines logo]()
$631
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:45 pm -
1 stop14h 45m
Sun 11/1512:30 pm -
2 stops38h 56m
Deal found 9/10![United Airlines logo]()
$743
This Delta deal was found by Cheapflights users on 9/6. 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.
Tue 11/106:40 am -
2 stops21h 55m
Sun 11/155:00 am -
2 stops23h 54m
Deal found 9/6![Delta logo]()
$782
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:00 pm -
2 stops20h 25m
Sat 10/319:25 am -
2 stops17h 55m
Deal found 9/9![KLM logo]()
$787
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:35 am -
2 stops27h 10m
Thu 10/296:00 am -
2 stops22h 35m
Deal found 9/7![United Airlines logo]()
$872
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:17 pm -
3 stops42h 03m
Sat 10/3112:30 pm -
2 stops52h 48m
Deal found 9/9![United Airlines logo]()
$1,027
This Ovago deal was found by Cheapflights users on 9/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:12 pm -
2 stops18h 38m
Sat 10/3112:35 pm -
1 stop29h 09m
Deal found 9/9![Lufthansa logo]()
$1,150
This Ovago deal was found by Cheapflights users on 9/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:45 pm -
1 stop14h 45m
Sun 11/1512:35 pm -
1 stop32h 38m
Deal found 9/9![Lufthansa logo]()
$1,406
Best flights from San Antonio to PortoDiscover carefully curated flight deals from San Antonio to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from San Antonio to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This American Airlines deal was found by Cheapflights users on 9/9. 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 11/1011:22 am -
2 stops18h 23m
Sun 11/158:20 am -
2 stops19h 59m
Deal found 9/9![American Airlines logo]()
$631
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:45 pm -
1 stop14h 45m
Sun 11/1512:30 pm -
2 stops38h 56m
Deal found 9/10![United Airlines logo]()
$743
This Delta deal was found by Cheapflights users on 9/7. 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.
Tue 11/107:40 am -
2 stops20h 55m
Sun 11/155:00 am -
2 stops23h 54m
Deal found 9/7![Delta logo]()
$782
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:00 pm -
2 stops20h 25m
Sat 10/319:25 am -
2 stops17h 55m
Deal found 9/9![KLM logo]()
$787
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/812:50 pm -
1 stop14h 40m
Sun 3/216:00 am -
2 stops43h 10m
Deal found 9/7![United Airlines logo]()
$805
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:35 am -
2 stops27h 10m
Thu 10/296:00 am -
2 stops22h 35m
Deal found 9/7![United Airlines logo]()
$872
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:17 pm -
3 stops42h 03m
Sat 10/3112:30 pm -
2 stops52h 48m
Deal found 9/9![United Airlines logo]()
$1,027
Last-minute flights from San Antonio to PortoDiscover last-minute flight deals from San Antonio to Porto. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Porto. Data last updated September 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:35 am -
2 stops27h 10m
Thu 10/296:00 am -
2 stops22h 35m
Deal found 9/7![United Airlines logo]()
$872
This KLM deal was found by Cheapflights users on 9/9. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:00 pm -
2 stops20h 25m
Sat 10/319:25 am -
2 stops17h 55m
Deal found 9/9![KLM logo]()
$787
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:17 pm -
3 stops42h 03m
Sat 10/3112:30 pm -
2 stops52h 48m
Deal found 9/9![United Airlines logo]()
$1,027
This Ovago deal was found by Cheapflights users on 9/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:12 pm -
2 stops18h 38m
Sat 10/3112:35 pm -
1 stop29h 09m
Deal found 9/9![Lufthansa logo]()
$1,150
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:50 am -
3 stops26h 30m
Sat 10/318:50 am -
3 stops32h 23m
Deal found 9/9![Multiple Airlines logo]()
$1,624
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:09 pm -
2 stops23h 51m
Sun 11/112:25 pm -
2 stops39h 32m
Deal found 9/10![Multiple Airlines logo]()
$2,019
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 10/251:20 pm -
1 stop12h 55m
Sun 11/15:00 am -
2 stops23h 20m
Deal found 9/10![Delta logo]()
$2,994
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2512:45 pm -
1 stop15h 45m
Sun 11/112:35 pm -
1 stop32h 38m
Deal found 9/10![United Airlines logo]()
$9,222
One-way flights from San Antonio to PortoSearch for one-way flight options from San Antonio to Porto. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from San Antonio to Porto. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:03 am -
3 stops28h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$402
This United Airlines deal was found by Cheapflights users on 9/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:00 am -
1 stop21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$669
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:11 pm -
3 stops28h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$1,091
This Ovago deal was found by Cheapflights users on 9/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/274:17 pm -
2 stops41h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Lufthansa logo]()
$1,439
This AranGrant deal was found by Cheapflights users on 9/8. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:48 am -
2 stops19h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Lufthansa logo]()
$1,809
This Air France deal was found by Cheapflights users on 9/8. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:20 pm -
1 stop15h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Air France logo]()
$2,206
This Delta deal was found by Cheapflights users on 9/8. 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 9/301:20 pm -
1 stop15h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$9,038
Find flight deals from San Antonio to Porto
Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Porto (OPO). 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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $631 (American Airlines) |
One-way from | $402 (Kiwi.com) |
Popular in | June |
Cheapest in | March |
Average price | $1,048 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio to Porto 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 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from San Antonio to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Wed 9/30
10:03 am-11:20 pm
2 stops31h 17m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$439
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Tue 11/10
11:22 am-11:45 am
2 stops18h 23m
Porto
Sun 11/15
8:20 am-10:19 pm
2 stops19h 59m
$631
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Wed 9/30
6:00 am-9:45 am
1 stop21h 45m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$669
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Tue 11/10
12:45 pm-9:30 am
1 stop14h 45m
Porto
Sun 11/15
12:30 pm-9:26 pm
2 stops38h 56m
$743
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Tue 11/10
7:40 am-10:35 am
2 stops20h 55m
Porto
Sun 11/15
5:00 am-10:54 pm
2 stops23h 54m
$782
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Sat 10/24
2:00 pm-4:25 pm
2 stops20h 25m
Porto
Sat 10/31
9:25 am-10:20 pm
2 stops17h 55m
$787
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Mon 3/8
12:50 pm-9:30 am
1 stop14h 40m
Porto
Sun 3/21
6:00 am-8:10 pm
2 stops43h 10m
$805
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Thu 10/22
6:35 am-3:45 pm
2 stops27h 10m
Porto
Thu 10/29
6:00 am-11:35 pm
2 stops22h 35m
$872
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Sat 10/24
4:17 pm-4:20 pm
3 stops42h 03m
Porto
Sat 10/31
12:30 pm-12:18 pm
2 stops52h 48m
$1,027
San AntonioPorto
SAT San Antonio - OPO Porto
SATOPO
San Antonio
Sun 9/27
4:17 pm-3:40 pm
2 stops41h 23m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$1,439
Showing 1-10 of 12 resultsSorted by cheapest first
Compare providers for flights from San Antonio to Porto
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 San Antonio to Porto in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Antonio-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Antonio-Porto flights, Cheapflights users trust FlightHub the most. FlightHub 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 San Antonio-Porto 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 San Antonio to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from San Antonio with our price prediction graph.
SAT-OPO
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.
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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