Delta SkyMiles award flights from Houston (IAH) to Porto (OPO)
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In the last 30 days AwardTool saw Delta SkyMiles award space for IAH→OPO in economy, premium economy, business class and first class. Lowest economy: 35,000 miles + $35.20 (economy space on 24 dates). Lowest business class: 125,000 miles + $35.20 on a mixed-cabin itinerary (part of the trip in a lower cabin; business-class space on 17 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 35,000 miles + $35.20
- economy space on 24 dates
- Lowest business class (mixed cabin)
- 125,000 miles + $35.20
- business-class space on 17 dates · part of the trip in a lower cabin
- Lowest first class
- 395,500 miles + $35.60
- first-class space on 14 dates
- Lowest premium economy
- 75,000 miles + $35.20
- premium economy space on 4 dates
SkyMiles award prices by cabin
The lowest one-way Delta SkyMiles award AwardTool observed on IAH→OPO in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 35,000 miles + $35.20 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 6 | 24 | See dates | |
| Premium Economy | 75,000 miles + $35.20 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 6 | 4 | See dates | |
| Business | 125,000 miles + $35.20Mixed cabin | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 17 | See dates | |
| First | 395,500 miles + $35.60 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 14 | 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 SkyMiles award examples
| Departure | Cabin | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|
| Economy | 52,300 miles + $35.30 | 9+ | 1 stop | Check this date | ||
| Economy | 55,100 miles + $24.10 | 6 | 2 stops | Check this date | ||
| Premium Economy | 266,400 miles + $24.10 | 2 | 2 stops | Check this date | ||
| First | 499,900 miles + $24.10 | 1 | 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 SkyMiles award space showed up
Departure dates in the next 365 days that AwardTool checked for Delta SkyMiles in the last 30 days, how many had award space in each cabin at any price, and the latest departure with space.
| Cabin | Dates with space | Share of dates checked | Latest departure with space |
|---|---|---|---|
| Economy | 24 of 28 | 85% | |
| Premium Economy | 4 of 28 | 14% | |
| Business | 17 of 28 | 60% | |
| First | 14 of 28 | 50% |
Best months to fly from Houston (IAH) to Porto (OPO) with SkyMiles
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 52,300 (2 dates) | 266,400 (1 date) | — | 499,900 (1 date) | |
| 35,000 (5 dates) | 75,000 (2 dates) | 125,000 (5 dates)Mixed cabin | 499,900 (5 dates) | |
| 35,000 (7 dates) | 101,100 (1 date) | 499,900 (6 dates) | 499,900 (5 dates) | |
| 38,900 (5 dates) | — | 395,500 (5 dates) | 395,500 (3 dates) | |
| 59,000 (3 dates) | — | 485,500 (1 date) | — | |
| 411,900 (2 dates) | — | — | — |
How to get SkyMiles
- American Express Membership Rewards: 1:1 · Instant
Check current transfer bonuses. Most transfers can't be reversed.
SkyMiles vs other programs from Houston (IAH) to Porto (OPO)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 40,000 pts + $75.71 | — | 294,502 pts + $59.61Mixed cabin | — |
| Air France/KLM Flying Blue | 18,750 pts + $152.60 | 40,000 pts + $242.00 | 145,000 pts + $361.70 | — |
| American Airlines AAdvantage | 22,500 pts + $35.20 | 40,000 pts + $563.10 | 57,500 pts + $763.10Lowest | — |
| Avianca LifeMiles | 40,000 pts + $58.00 | — | — | — |
| Delta SkyMiles | 35,000 pts + $35.20 | 75,000 pts + $35.20 | 125,000 pts + $35.20Mixed cabin | 395,500 pts + $35.60 |
| GOL Smiles | 9,500 pts + taxes not reported | 533,500 pts + taxes not reported | — | — |
| Lufthansa Miles & More | 4,409 pts + $337.40Lowest | — | 98,022 pts + $1,548.40 | — |
| Qantas Frequent Flyer | 29,000 pts + $349.00 | 116,500 pts + $1,608.60 | 108,000 pts + $1,483.60 | — |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | — | 90,000 pts + taxes not reported | — |
| United MileagePlus | 40,000 pts + $5.60 | 55,000 pts + $22.50 | 88,000 pts + $28.20Mixed cabin | 200,000 pts + $5.60Lowest |
| Virgin Atlantic Flying Club | 15,000 pts + $179.80 | 39,000 pts + $312.00Lowest | — | — |
Questions about SkyMiles award flights from Houston (IAH) to Porto (OPO)
How many miles do you need to fly from Houston (IAH) to Porto (OPO) with Delta SkyMiles?
The lowest one-way Delta SkyMiles awards AwardTool observed in the last 30 days (newest observation Oct 16, 2026): economy 35,000 miles + $35.20, with a typical monthly low of 38,900 miles over 6 months and award space on 24 departure dates; premium economy 75,000 miles + $35.20, with a typical monthly low of 101,100 miles over 3 months and award space on 4 departure dates; business class 125,000 miles + $35.20, a mixed-cabin award, with a typical monthly low of 395,500 miles over 4 months and award space on 17 departure dates; first class 395,500 miles + $35.60, with monthly lows of 395,500 miles in 1 month and 499,900 miles in 3 months, and award space on 14 departure dates. Monthly lows varied in economy (35,000 to 411,900 miles), premium economy (75,000 to 266,400 miles), business class (125,000 to 499,900 miles) and first class (395,500 to 499,900 miles), so the award on your dates may cost more. Search live before transferring points.
What's the lowest SkyMiles award from Houston (IAH) to Porto (OPO)?
In economy, 35,000 miles + $35.20. Delta SkyMiles showed economy award space on 24 departure dates at any price (newest observation Oct 16, 2026, 21:20 UTC). In business class, 125,000 miles + $35.20 on a mixed-cabin itinerary (part of the trip in a lower cabin). Delta SkyMiles showed business-class award space on 17 departure dates at any price (newest observation Oct 16, 2026, 21:20 UTC). Search live before transferring points.
Can you book nonstop awards from Houston (IAH) to Porto (OPO) with SkyMiles?
AwardTool hasn't observed nonstop Delta SkyMiles award space on this route in the last 30 days. That doesn't mean nonstop space never appears.
Which credit card points can book SkyMiles awards from Houston (IAH) to Porto (OPO)?
American Express Membership Rewards (1:1, Instant). Check current transfer bonuses; most transfers can't be reversed.
Which months had the lowest SkyMiles award prices from Houston (IAH) to Porto (OPO)?
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 Mar 2027 departures: 35,000 miles (7 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.