Award flights from Porto (OPO) to St. Louis (STL)
Search flights from Porto (OPO) to St. Louis (STL)
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In the last 30 days AwardTool saw award space on 6 programs for OPO→STL. Lowest economy: 30,000 miles + $124.73 (American Airlines AAdvantage). Lowest business class: 57,500 miles + $1,026.19 (American Airlines AAdvantage). Lowest first class: 320,000 miles + $59.52 (Delta SkyMiles).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
Porto (OPO) to St. Louis (STL) at a glance
- From
- Francisco de Sa Carneiro Airport, Porto, Portugal (OPO)
- To
- St. Louis Lambert International, St. Louis, Missouri, United States (STL)
- Programs with award space seen
- 6 of 6 programs tracked on this route
- Nonstop award space seen
- Not seen in the last 30 days
- Airlines seen on these awards
- American Airlines (AA), Air Canada (AC), Air France (AF), JetBlue (B6), British Airways (BA), Delta Air Lines (DL), Eurowings (EW), KLM (KL), Lufthansa (LH), LOT Polish Airlines (LO), SWISS (LX), Austrian (OS) and 3 more
- Departures with open awards
- Nov 2026 to Jun 2027
- Most dates with space
- 27 of 27 departure dates checked (United MileagePlus, economy)
- Latest departure with space
- Observation window
- Awards observed in the last 30 days
- Destination guide
- Award flights to St. Louis (STL)
Compare programs by cabin
The lowest one-way award each program showed in each cabin, sorted by points.
Economy
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| American Airlines AAdvantageLowest observed | 30,000 pts + $124.73 | 2 stops | American Airlines (AA), British Airways (BA) | — | 14 | See dates | |
| Air France/KLM Flying Blue | 31,500 pts + $309.33 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 24 | See dates | |
| Delta SkyMiles | 34,000 pts + $59.52 | 2 stops | Air France (AF), Delta Air Lines (DL) | 8 | 21 | See dates | |
| Avianca LifeMiles | 37,000 pts + $58.00 | 1 stop | Lufthansa (LH), United Airlines (UA) | 5 | 6 | See dates | |
| United MileagePlus | 40,000 pts + $57.29 | 1 stop | Air Canada (AC), JetBlue (B6), Eurowings (EW), Lufthansa (LH) +6 more | 5 | 27 | See dates | |
| Air Canada Aeroplan | 40,000 pts + $127.30 | 1 stop | Lufthansa (LH), United Airlines (UA) | 5 | 6 | See dates |
Premium Economy
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| American Airlines AAdvantageLowest observed | 40,000 pts + $581.59 | 2 stops | American Airlines (AA), British Airways (BA) | — | 9 | See dates | |
| United MileagePlus | 55,000 pts + $73.99 | 2 stops | Lufthansa (LH), SWISS (LX), TAP Portugal (TP), United Airlines (UA) | 9+ | 13 | See dates | |
| Air France/KLM Flying Blue | 67,000 pts + $313.89 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 21 | See dates | |
| Delta SkyMiles | 160,000 pts + $59.52 | 2 stops | Delta Air Lines (DL) | 6 | 16 | See dates |
Not seen in premium economy: Air Canada Aeroplan and Avianca LifeMiles.
Business Class
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| American Airlines AAdvantageLowest observed | 57,500 pts + $1,026.19 | 2 stops | American Airlines (AA), British Airways (BA) | — | 14 | See dates | |
| Air Canada Aeroplan | 75,000 pts + $138.00 | 1 stop | Lufthansa (LH) | 5 | 2 | See dates | |
| United MileagePlus | 88,000 pts + $58.79Mixed cabin | 2 stops | Lufthansa (LH), SWISS (LX), TAP Portugal (TP), United Airlines (UA) | 1 | 27 | See dates | |
| Air France/KLM Flying Blue | 129,000 pts + $453.09 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 23 | See dates |
Not seen in business class: Avianca LifeMiles and Delta SkyMiles.
First Class
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Delta SkyMiles | 320,000 pts + $59.52 | 2 stops | Delta Air Lines (DL) | 2 | 18 | See dates |
Not seen in first class: American Airlines AAdvantage, Air Canada Aeroplan, Avianca LifeMiles, Air France/KLM Flying Blue and United MileagePlus.
Not seen means AwardTool hasn't observed this cabin on this route in the last 30 days. It doesn't mean the airline has no seats. Dates seen counts departure dates with an open award in that cabin at any price; newest observation is the latest time AwardTool saw one of them. Seats is the count the program reported when we observed it; some programs report at most 9.
Observed award examples
| Departure | Cabin | Program | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|---|
| Economy | American Airlines AAdvantage | 30,000 pts + $124.73 | — | 2 stops | Check this date | ||
| Economy | Avianca LifeMiles | 37,000 pts + $58.00 | 9+ | 2 stops | Check this date | ||
| Premium Economy | Air France/KLM Flying Blue | 67,000 pts + $313.89 | 4 | 2 stops | Check this date | ||
| Business | American Airlines AAdvantage | 57,500 pts + $1,028.73 | — | 2 stops | Check this date | ||
| Business | Air Canada Aeroplan | 75,000 pts + $172.14 | 9+ | 1 stop | Check this date | ||
| Business | United MileagePlus | 88,000 pts + $89.49Mixed cabin | 7 | 2 stops | Check this date | ||
| First | Delta SkyMiles | 420,000 pts + $58.72 | 2 | 2 stops | Check this date |
Prices are one-way per traveler: the program's points or miles plus taxes and carrier fees in USD, as AwardTool observed them in the observation window. Award space changes constantly. A seat we saw may be gone, and space we haven't seen may exist. Always confirm with a live search before transferring points; most transfers can't be reversed.
Best months to fly from Porto (OPO) to St. Louis (STL) on points
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 31,500 · Flying Blue (12 dates) | 67,000 · Flying Blue (10 dates) | 75,000 · Aeroplan (2 dates) | 420,000 · SkyMiles (6 dates) | |
| 30,000 · AAdvantage (1 date) | — | 57,500 · AAdvantage (1 date) | — | |
| 30,000 · AAdvantage (3 dates) | 55,000 · MileagePlus (3 dates) | 57,500 · AAdvantage (3 dates) | 320,000 · SkyMiles (3 dates) | |
| 30,000 · AAdvantage (7 dates) | 40,000 · AAdvantage (5 dates) | 57,500 · AAdvantage (7 dates) | 495,000 · SkyMiles (6 dates) | |
| 44,000 · MileagePlus (3 dates) | 147,500 · AAdvantage (2 dates) | 169,000 · Flying Blue (2 dates) | 495,000 · SkyMiles (3 dates) |
Points that transfer to these programs
| Program | Amex | Bilt | Capital One | Chase | Citi | Wells Fargo |
|---|---|---|---|---|---|---|
| Air Canada Aeroplan | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | — | — |
| Air France/KLM Flying Blue | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant |
| American Airlines AAdvantage | — | — | — | — | 1:1 · Instant | — |
| Avianca LifeMiles | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | — | 1:1 · Instant | 1:1 · Instant |
| Delta SkyMiles | 1:1 · Instant | — | — | — | — | — |
| United MileagePlus | — | 1:1 · Instant | — | 1:1 · Instant | — | — |
Check current transfer bonuses. Most transfers can't be reversed.
Search, calendar and alerts from Porto (OPO) to St. Louis (STL)
Route calendar
Every departure date with open award seats on OPO→STL for Air France/KLM Flying Blue and the other programs: a limited window on the free plan and 365 days with Pro.
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Search Porto (OPO) to St. Louis (STL)How many miles you need from Porto (OPO) to St. Louis (STL)
- In economy, American Airlines AAdvantage had the lowest observed award, 30,000 miles + $124.73; see how many miles you need with American Airlines AAdvantage.
- In premium economy, American Airlines AAdvantage had the lowest observed award, 40,000 miles + $581.59; see how many miles you need with American Airlines AAdvantage.
- In business class, American Airlines AAdvantage had the lowest observed award, 57,500 miles + $1,026.19; see how many miles you need with American Airlines AAdvantage.
- In first class, Delta SkyMiles had the lowest observed award, 320,000 miles + $59.52; see how many miles you need with Delta SkyMiles.
Questions about award flights from Porto (OPO) to St. Louis (STL)
What's the lowest Porto (OPO) to St. Louis (STL) award price AwardTool has seen?
In economy, 30,000 miles + $124.73 with American Airlines AAdvantage. Seen Sep 29, 2026, 03:11 UTC for a Dec 15, 2026 departure. American Airlines AAdvantage showed economy award space on 14 departure dates at any price (newest observation Oct 10, 2026, 18:30 UTC). In business class, 57,500 miles + $1,026.19 with American Airlines AAdvantage. Seen Sep 29, 2026, 03:11 UTC for a Dec 15, 2026 departure. American Airlines AAdvantage showed business-class award space on 14 departure dates at any price (newest observation Oct 10, 2026, 18:30 UTC). Search live before transferring points.
Which loyalty programs had award space from Porto (OPO) to St. Louis (STL)?
6 programs in the last 30 days: American Airlines AAdvantage (economy 14 dates, premium economy 9 dates, business class 14 dates); Air Canada Aeroplan (economy 6 dates, business class 2 dates); Avianca LifeMiles (economy 6 dates); Delta SkyMiles (economy 21 dates, premium economy 16 dates, first class 18 dates); Air France/KLM Flying Blue (economy 24 dates, premium economy 21 dates, business class 23 dates); United MileagePlus (economy 27 dates, premium economy 13 dates, business class 27 dates). Dates count departure dates with an open award.
Is there nonstop award space from Porto (OPO) to St. Louis (STL)?
AwardTool hasn't observed nonstop award space on this route in the last 30 days. The awards it saw connected with 1 to 2 stops on itineraries including American Airlines, Air Canada, Air France and JetBlue. That doesn't mean nonstop space never appears.
Which credit card points can book awards from Porto (OPO) to St. Louis (STL)?
American Express Membership Rewards: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Delta SkyMiles (1:1), Air France/KLM Flying Blue (1:1). Bilt Rewards: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1), United MileagePlus (1:1). Capital One Miles: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1). Chase Ultimate Rewards: Air Canada Aeroplan (1:1), Air France/KLM Flying Blue (1:1), United MileagePlus (1:1). Citi ThankYou Points: American Airlines AAdvantage (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1). Wells Fargo Rewards: Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1). Ratios come from AwardTool's transfer partner list; check current bonuses first.
Which months had the lowest award prices from Porto (OPO) to St. Louis (STL)?
Counting only month prices from programs with award space on 2 or more dates that month, and leaving out unusually low outliers: in economy, the lowest award was for May 2027 departures, 30,000 miles with AAdvantage (7 dates); in business class, the lowest award was for May 2027 departures, 57,500 miles with AAdvantage (7 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.