Delta SkyMiles award flights from San Francisco (SFO) to Bilbao (BIO)
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In the last 30 days AwardTool saw Delta SkyMiles award space for SFO→BIO in economy, premium economy, business class and first class. Lowest economy: 37,100 miles + $24.50 (economy space on 44 dates). Lowest business class: 380,500 miles + $24.20 (business-class space on 15 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 37,100 miles + $24.50
- economy space on 44 dates
- Lowest business class
- 380,500 miles + $24.20
- business-class space on 15 dates
- Lowest first class (mixed cabin)
- 380,500 miles + $24.20
- first-class space on 21 dates · part of the trip in a lower cabin
- Lowest premium economy
- 98,300 miles + $24.50
- premium economy space on 6 dates
SkyMiles award prices by cabin
The lowest one-way Delta SkyMiles award AwardTool observed on SFO→BIO in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 37,100 miles + $24.50 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 44 | See dates | |
| Premium Economy | 98,300 miles + $24.50 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 3 | 6 | See dates | |
| Business | 380,500 miles + $24.20 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 7 | 15 | See dates | |
| First | 380,500 miles + $24.20Mixed cabin | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 5 | 21 | 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 | 44,600 miles + $35.40 | 9+ | 2 stops | Check this date | ||
| Economy | 44,600 miles + $35.40 | 9+ | 2 stops | Check this date | ||
| Economy | 45,100 miles + $24.10 | 9+ | 2 stops | Check this date | ||
| Premium Economy | 115,900 miles + $24.10 | 5 | 2 stops | Check this date | ||
| Premium Economy | 115,900 miles + $35.40 | 3 | 2 stops | Check this date | ||
| Premium Economy | 122,400 miles + $35.40 | 2 | 2 stops | Check this date | ||
| Business | 499,900 miles + $24.10 | 3 | 2 stops | Check this date | ||
| First | 499,900 miles + $24.10 | 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 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 | 44 of 48 | 91% | |
| Premium Economy | 6 of 48 | 12% | |
| Business | 15 of 48 | 31% | |
| First | 21 of 48 | 43% |
Best months to fly from San Francisco (SFO) to Bilbao (BIO) with SkyMiles
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 55,700 (6 dates) | — | — | 499,900 (1 date) | |
| 44,600 (16 dates) | 115,900 (4 dates) | 499,900 (2 dates) | 499,900 (7 dates) | |
| 44,600 (4 dates) | 317,600 (1 date) | — | 499,900 (3 dates) | |
| 37,100 (3 dates) | 98,300 (1 date) | 499,900 (3 dates) | 499,900 (3 dates) | |
| 47,000 (1 date) | — | 650,500 (1 date) | 650,500 (1 date) | |
| 40,600 (4 dates) | — | 380,500 (3 dates) | 453,000 (1 date) | |
| 51,200 (1 date) | — | — | — | |
| 55,200 (3 dates) | — | — | — | |
| 39,500 (6 dates) | — | 380,500 (6 dates) | 380,500 (5 dates)Mixed cabin |
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 San Francisco (SFO) to Bilbao (BIO)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 55,000 pts + $75.71 | 89,435 pts + $127.31 | 90,000 pts + $92.61 | — |
| Air France/KLM Flying Blue | 18,750 pts + $155.70Lowest | 61,500 pts + $247.20 | 127,000 pts + $362.20 | — |
| Alaska Atmos Rewards | 35,000 pts + $30.50 | 55,000 pts + $41.00 | 400,000 pts + $29.00Mixed cabin | 350,000 pts + $30.40Mixed cabin |
| American Airlines AAdvantage | 22,500 pts + $9.00 | 40,000 pts + $9.00Lowest | 57,500 pts + $64.40Lowest | — |
| Avianca LifeMiles | 55,000 pts + $52.10 | — | — | — |
| Delta SkyMiles | 37,100 pts + $24.50 | 98,300 pts + $24.50 | 380,500 pts + $24.20 | 380,500 pts + $24.20Mixed cabin |
| Qantas Frequent Flyer | 51,800 pts + $407.40 | 97,900 pts + $117.70 | 125,400 pts + $1,500.60 | — |
| TAP Air Portugal Miles&Go | 19,000 pts + $84.12 | — | 190,000 pts + $86.15 | — |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | — | 175,000 pts + taxes not reported | — |
| United MileagePlus | 40,000 pts + $5.60 | 55,000 pts + $28.40 | 88,000 pts + $28.50 | 200,000 pts + $11.20Lowest |
Questions about SkyMiles award flights from San Francisco (SFO) to Bilbao (BIO)
How many miles do you need to fly from San Francisco (SFO) to Bilbao (BIO) with Delta SkyMiles?
The lowest one-way Delta SkyMiles awards AwardTool observed in the last 30 days: economy 37,100 miles + $24.50, with a typical monthly low of 44,600 miles over 9 months and award space on 44 departure dates (newest observation Oct 15, 2026); premium economy 98,300 miles + $24.50, with a typical monthly low of 115,900 miles over 3 months and award space on 6 departure dates (newest observation Oct 7, 2026); business class 380,500 miles + $24.20, with a typical monthly low of 499,900 miles over 5 months and award space on 15 departure dates (newest observation Oct 12, 2026); first class 380,500 miles + $24.20, a mixed-cabin award, with a typical monthly low of 499,900 miles over 7 months and award space on 21 departure dates (newest observation Oct 12, 2026). Monthly lows varied in economy (37,100 to 55,700 miles), premium economy (98,300 to 317,600 miles), business class (380,500 to 650,500 miles) and first class (380,500 to 650,500 miles), so the award on your dates may cost more. Search live before transferring points.
What's the lowest SkyMiles award from San Francisco (SFO) to Bilbao (BIO)?
In economy, 37,100 miles + $24.50. Delta SkyMiles showed economy award space on 44 departure dates at any price (newest observation Oct 15, 2026, 20:19 UTC). In business class, 380,500 miles + $24.20. Delta SkyMiles showed business-class award space on 15 departure dates at any price (newest observation Oct 12, 2026, 22:02 UTC). Search live before transferring points.
Can you book nonstop awards from San Francisco (SFO) to Bilbao (BIO) 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 San Francisco (SFO) to Bilbao (BIO)?
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 San Francisco (SFO) to Bilbao (BIO)?
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 Jan 2027 departures: 37,100 miles (3 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.