Economy award flights from Porto (OPO) to St. Louis (STL)
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In the last 30 days AwardTool saw economy award space on 6 programs for OPO→STL. Lowest: 30,000 miles + $124.73 with American Airlines AAdvantage, which showed economy award space on 14 dates. No nonstop economy award was seen in the last 30 days.
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest observed
- 30,000 miles + $124.73
- American Airlines AAdvantage
- Programs with space
- 6 of 6
- programs seen on this route
- Most dates seen
- 27 of 27
- dates checked · United MileagePlus
- Nonstop
- Not seen
- in the last 30 days
Compare programs for economy
The lowest one-way economy award each program showed on OPO→STL, sorted by points.
| 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 |
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 economy award examples
| Departure | Program | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|
| American Airlines AAdvantage | 30,000 pts + $124.73 | — | 2 stops | Check this date | ||
| Air France/KLM Flying Blue | 31,500 pts + $309.33 | 9+ | 1 stop | Check this date | ||
| Air France/KLM Flying Blue | 36,500 pts + $221.13 | 9+ | 2 stops | Check this date | ||
| Avianca LifeMiles | 37,000 pts + $58.00 | 9+ | 2 stops | Check this date | ||
| Avianca LifeMiles | 37,000 pts + $58.00 | 9+ | 2 stops | Check this date | ||
| Air Canada Aeroplan | 40,000 pts + $127.30 | 5 | 1 stop | Check this date | ||
| United MileagePlus | 40,000 pts + $57.29 | 5 | 1 stop | Check this date | ||
| Delta SkyMiles | 48,000 pts + $58.72 | 9+ | 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.
How often economy award space showed up
Departure dates in the next 365 days that AwardTool checked for each program in the last 30 days, how many had economy award space at any price, and the latest departure with space.
| Program | Dates with space | Share of dates checked | Latest departure with space |
|---|---|---|---|
| American Airlines AAdvantage | 14 of 30 | 46% | |
| Air France/KLM Flying Blue | 24 of 26 | 92% | |
| Delta SkyMiles | 21 of 28 | 75% | |
| Avianca LifeMiles | 6 of 27 | 22% | |
| United MileagePlus | 27 of 27 | 100% | |
| Air Canada Aeroplan | 6 of 28 | 21% |
Best months for economy from Porto (OPO) to St. Louis (STL)
| Month | Lowest observed | Program | Dates |
|---|---|---|---|
| 31,500 pts + taxes vary | Air France/KLM Flying Blue | 12 | |
| 30,000 pts + taxes vary | American Airlines AAdvantage | 1 | |
| 30,000 pts + taxes vary | American Airlines AAdvantage | 3 | |
| 30,000 pts + taxes vary | American Airlines AAdvantage | 7 | |
| 44,000 pts + taxes vary | United MileagePlus | 3 |
Lowest economy award by month and program
Each program's lowest one-way economy award by departure month, in its own points or miles; taxes vary. — means the program showed no economy space that month.
| Program | |||||
|---|---|---|---|---|---|
| American Airlines AAdvantagemiles | — | 30,000 | 30,000 | 30,000 | 66,500 |
| Air France/KLM Flying Bluemiles | 31,500 | — | 49,800 | 36,500 | 86,900 |
| Delta SkyMilesmiles | 48,000 | — | 34,000 | 43,000 | 62,000 |
| Avianca LifeMilesmiles | 37,000 | — | — | 37,000 | — |
| United MileagePlusmiles | 40,000 | — | 44,000 | 44,000 | 44,000 |
| Air Canada Aeroplanpoints | 40,000 | — | — | 42,500 | — |
Airlines seen in economy
Airlines that appeared on the award itineraries AwardTool observed, and the programs that showed them.
- American Airlines (AA): American Airlines AAdvantage
- Air Canada (AC): United MileagePlus
- Air France (AF): Air France/KLM Flying Blue and Delta SkyMiles
- JetBlue (B6): United MileagePlus
- British Airways (BA): American Airlines AAdvantage
- Delta Air Lines (DL): Air France/KLM Flying Blue and Delta SkyMiles
- Eurowings (EW): United MileagePlus
- KLM (KL): Air France/KLM Flying Blue
- Lufthansa (LH): Avianca LifeMiles, United MileagePlus and Air Canada Aeroplan
- LOT Polish Airlines (LO): United MileagePlus
- SWISS (LX): United MileagePlus
- Austrian (OS): United MileagePlus
- Turkish Airlines (TK): United MileagePlus
- TAP Portugal (TP): United MileagePlus
- United Airlines (UA): Avianca LifeMiles, United MileagePlus and Air Canada Aeroplan
Economy on nearby routes
The lowest economy award AwardTool observed on related routes, as each route's page shows it: the return direction, other airports in the same cities, and more routes from Porto (OPO) and to St. Louis (STL). One way, in the program's points or miles; taxes are on each route's page.
| Route | Lowest observed | Program | Dates seen |
|---|---|---|---|
| Porto (OPO) to Newark (EWR)Also from OPO | 12,000 points | Virgin Atlantic Flying Club | 12 |
| Porto (OPO) to São Paulo Guarulhos (GRU)Also from OPO | 30,000 miles | Air France/KLM Flying Blue | 96 |
| Porto (OPO) to Amsterdam (AMS)Also from OPO | 7,600 miles | GOL Smiles | 324 |
| Porto (OPO) to Rio de Janeiro Galeão (GIG)Also from OPO | 30,000 miles | Air France/KLM Flying Blue | 87 |
| London Heathrow (LHR) to St. Louis (STL)Also to STL | 10,975 miles | Lufthansa Miles & More | 50 |
| New York LaGuardia (LGA) to St. Louis (STL)Also to STL | 7,000 milesNonstop | American Airlines AAdvantage | 319 |
| Seattle (SEA) to St. Louis (STL)Also to STL | 8,300 miles | Delta SkyMiles | 22 |
| Los Angeles (LAX) to St. Louis (STL)Also to STL | 9,500 milesNonstop | American Airlines AAdvantage | 328 |
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.
Questions about economy award flights from Porto (OPO) to St. Louis (STL)
What's the lowest economy award from Porto (OPO) to St. Louis (STL)?
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). Search live before transferring points.
Which programs had economy award space from Porto (OPO) to St. Louis (STL)?
American Airlines AAdvantage (14 dates), Air France/KLM Flying Blue (24 dates), Delta SkyMiles (21 dates), Avianca LifeMiles (6 dates), United MileagePlus (27 dates) and Air Canada Aeroplan (6 dates), in the last 30 days.
Is there nonstop economy award space from Porto (OPO) to St. Louis (STL)?
AwardTool hasn't observed nonstop economy award space on this route in the last 30 days. That doesn't mean nonstop space never appears.
Which months had the lowest economy 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, the lowest economy award AwardTool observed was for May 2027 departures: 30,000 miles with AAdvantage (7 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.