Cheap Flights to Castro Urdiales from HK$599

View HK$599 flight on Tue, 21 Oct 2025Opens in a new window

Popular airlines

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Castro Urdiales

Prices were available within the past 7 days and start at HK$599 for one-way flights and HK$1,190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Wed, 22 Oct - Tue, 28 Oct
BCN
Barcelona
BIO
Bilbao
HK$1,190 Return, found 1 day ago
HK$1,190
Return
found 1 day ago
Select Iberia flight, departing Wed, 22 Oct from Barcelona to Bilbao, returning Tue, 28 Oct, priced at HK$1,190 found 1 day ago
Lufthansa
Fri, 19 Sep - Mon, 29 Sep
VIE
Vienna
BIO
Bilbao
HK$2,682 Return, found 1 day ago
HK$2,682
Return
found 1 day ago
Select Lufthansa flight, departing Fri, 19 Sep from Vienna to Bilbao, returning Mon, 29 Sep, priced at HK$2,682 found 1 day ago
Eurowings
Mon, 22 Sep - Mon, 22 Sep
VIE
Vienna
BIO
Bilbao
HK$2,780 Return, found 1 day ago
HK$2,780
Return
found 1 day ago
Select Eurowings flight, departing Mon, 22 Sep from Vienna to Bilbao, returning Mon, 22 Sep, priced at HK$2,780 found 1 day ago
Austrian Airlines
Sat, 27 Sep - Mon, 29 Sep
VIE
Vienna
BIO
Bilbao
HK$2,872 Return, found 1 day ago
HK$2,872
Return
found 1 day ago
Select Austrian Airlines flight, departing Sat, 27 Sep from Vienna to Bilbao, returning Mon, 29 Sep, priced at HK$2,872 found 1 day ago
Swiss International Air Lines
Fri, 19 Sep - Mon, 29 Sep
VIE
Vienna
BIO
Bilbao
HK$3,060 Return, found 1 day ago
HK$3,060
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Fri, 19 Sep from Vienna to Bilbao, returning Mon, 29 Sep, priced at HK$3,060 found 1 day ago
Flights to Castro Urdiales information
Destination airport
Bilbao
Destination airport IATA code
BIO
Destination city name
Bilbao
Return price
HK$2,682

Trending flights to Castro Urdiales

Prices were available within the past 7 days and start at HK$599 for one-way flights and HK$1,190 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air France
Tue, 21 Oct - Wed, 29 Oct
HKG
Hong Kong SAR
BIO
Bilbao
HK$5,053 Return, found 4 days ago
HK$5,053
Return
found 4 days ago
Select Air France flight, departing Tue, 21 Oct from Hong Kong SAR to Bilbao, returning Wed, 29 Oct, priced at HK$5,053 found 4 days ago
*Available to Expedia members.