Delta SkyMiles award flights from Washington Dulles (IAD) to Porto (OPO)
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In the last 30 days AwardTool saw Delta SkyMiles award space for IAD→OPO in economy, premium economy, business class and first class. Lowest economy: 25,000 miles + $5.60 (economy space on 72 dates). Lowest business class: 125,000 miles + $5.60 on a mixed-cabin itinerary (part of the trip in a lower cabin; business-class space on 19 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 25,000 miles + $5.60
- economy space on 72 dates
- Lowest business class (mixed cabin)
- 125,000 miles + $5.60
- business-class space on 19 dates · part of the trip in a lower cabin
- Lowest first class
- 125,000 miles + $5.60
- first-class space on 66 dates
- Lowest premium economy
- 75,000 miles + $5.60
- premium economy space on 60 dates
SkyMiles award prices by cabin
The lowest one-way Delta SkyMiles award AwardTool observed on IAD→OPO in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 25,000 miles + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 72 | See dates | |
| Premium Economy | 75,000 miles + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 2 | 60 | See dates | |
| Business | 125,000 miles + $5.60Mixed cabin | 1 stop | Air France (AF), Delta Air Lines (DL) | 1 | 19 | See dates | |
| First | 125,000 miles + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 8 | 66 | 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 | 25,000 miles + $5.60 | 2 | 1 stop | Check this date | ||
| Economy | 25,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 25,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 75,000 miles + $5.60 | 2 | 1 stop | Check this date | ||
| Premium Economy | 75,000 miles + $5.60 | 7 | 1 stop | Check this date | ||
| Premium Economy | 75,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Business | 125,000 miles + $5.60Mixed cabin | 1 | 1 stop | Check this date | ||
| First | 125,000 miles + $5.60 | 8 | 1 stop | 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 | 72 of 79 | 91% | |
| Premium Economy | 60 of 79 | 75% | |
| Business | 19 of 79 | 24% | |
| First | 66 of 79 | 83% |
Best months to fly from Washington Dulles (IAD) to Porto (OPO) with SkyMiles
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 25,000 (5 dates) | 75,000 (3 dates) | — | 494,000 (4 dates) | |
| 25,000 (3 dates) | 75,000 (3 dates) | — | 125,000 (4 dates) | |
| 41,900 (3 dates) | 75,000 (1 date) | 125,000 (1 date)Mixed cabin | 479,000 (2 dates) | |
| 57,600 (1 date) | 264,000 (1 date) | — | 499,900 (1 date) | |
| 35,500 (6 dates) | 102,200 (3 dates) | 461,400 (1 date) | 131,200 (6 dates) | |
| 30,400 (10 dates) | 111,300 (5 dates) | 420,500 (2 dates) | 379,600 (5 dates) | |
| 26,700 (7 dates) | 75,000 (7 dates) | 420,500 (1 date) | 125,000 (7 dates) | |
| 40,200 (20 dates) | 212,900 (20 dates) | 425,500 (7 dates) | 408,400 (20 dates) | |
| 46,500 (5 dates) | 219,400 (5 dates) | 405,500 (3 dates) | 442,000 (5 dates) | |
| 31,200 (6 dates) | 113,700 (6 dates) | 380,500 (4 dates) | 380,500 (6 dates) | |
| 40,200 (6 dates) | 213,900 (6 dates) | — | 430,500 (6 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 Washington Dulles (IAD) to Porto (OPO)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 32,339 pts + $79.21 | — | 75,000 pts + $92.51 | — |
| Air France/KLM Flying Blue | 18,750 pts + $155.50 | 35,000 pts + $242.60 | 52,500 pts + $354.80Lowest | — |
| American Airlines AAdvantage | 22,500 pts + $35.20 | 40,000 pts + $35.50 | 57,500 pts + $35.30 | — |
| Avianca LifeMiles | 40,000 pts + $34.60 | — | — | — |
| Delta SkyMiles | 25,000 pts + $5.60 | 75,000 pts + $5.60 | 125,000 pts + $5.60Mixed cabin | 125,000 pts + $5.60Lowest |
| Etihad Guest | 57,000 pts + $195.00 | — | 99,999 pts + $335.00 | — |
| GOL Smiles | 9,500 pts + taxes not reported | — | 511,200 pts + taxes not reported | — |
| Lufthansa Miles & More | 88 pts + $325.00Lowest | — | 85,921 pts + $1,548.40 | 160,818 pts + $1,552.20 |
| Qantas Frequent Flyer | 23,300 pts + $349.00 | 102,300 pts + $800.50 | 90,000 pts + $494.20 | — |
| TAP Air Portugal Miles&Go | 29,000 pts + $57.24 | — | 199,000 pts + $57.26 | — |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | — | 90,000 pts + taxes not reported | — |
| United MileagePlus | 37,300 pts + $5.60 | 55,000 pts + $27.50 | 88,000 pts + $25.90Mixed cabin | 200,000 pts + $5.60 |
| Virgin Atlantic Flying Club | 12,000 pts + $179.80 | 24,000 pts + $179.80Lowest | 58,500 pts + $312.60 | — |
Questions about SkyMiles award flights from Washington Dulles (IAD) to Porto (OPO)
How many miles do you need to fly from Washington Dulles (IAD) to Porto (OPO) with Delta SkyMiles?
The lowest one-way Delta SkyMiles awards AwardTool observed in the last 30 days (newest observation Oct 18, 2026): economy 25,000 miles + $5.60, with a typical monthly low of 35,500 miles over 11 months and award space on 72 departure dates; premium economy 75,000 miles + $5.60, with a typical monthly low of 111,300 miles over 11 months and award space on 60 departure dates; business class 125,000 miles + $5.60, a mixed-cabin award, with a typical monthly low of 420,500 miles over 7 months and award space on 19 departure dates; first class 125,000 miles + $5.60, with a typical monthly low of 408,400 miles over 11 months and award space on 66 departure dates. Monthly lows varied in economy (25,000 to 57,600 miles), premium economy (75,000 to 264,000 miles), business class (125,000 to 461,400 miles) and first class (125,000 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 Washington Dulles (IAD) to Porto (OPO)?
In economy, 25,000 miles + $5.60. Seen Sep 30, 2026, 23:59 UTC for a Nov 27, 2026 departure. Delta SkyMiles showed economy award space on 72 departure dates at any price (newest observation Oct 18, 2026, 16:02 UTC). In business class, 125,000 miles + $5.60 on a mixed-cabin itinerary (part of the trip in a lower cabin). Seen Oct 9, 2026, 17:34 UTC for a Dec 16, 2026 departure. Delta SkyMiles showed business-class award space on 19 departure dates at any price (newest observation Oct 18, 2026, 03:20 UTC). Search live before transferring points.
Can you book nonstop awards from Washington Dulles (IAD) 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 Washington Dulles (IAD) 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 Washington Dulles (IAD) 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 Oct 2026 departures: 25,000 miles (5 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.