Ryanair - Gothenburg (GOT) - Dublin (DUB) - 9 EUR / $10 roundtrip (.0058 EUR / .6402 cents USD per mile flown)

https://www.google.com/travel/flight...u3z4Yv1oY5byCA






EDIT - Or 5 EUR one-way





Cebu Pacific - Manilla (MNL) - Dubai (DUB) - $125 roundtrip

https://www.google.com/travel/flight...sMHSRxsPqMh1y9






Cebu Pacific - Davao City (DVO) - Dubai (DXB) - $161 roundtrip

https://www.google.com/travel/flight...LyYP4B4smsw8PA






Cebu Pacific - Cebu City (CEB) - Tokyo (NRT) - $95 roundtrip

https://www.google.com/travel/flight...iuWgykZXqDGjy5





Avianca - Miami (MIA) - Belo Horizonte (CNF) - $201 roundtrip

https://www.google.com/travel/flight...NtG6o7coxgqJL6




Eurowings - Hamburg (HAM) - Malaga (AGP) - $74 / 68 EUR roundtrip

https://www.google.com/travel/flight...PgqdTYd3t9v9m6



JetStar - Melbourne (MEL) - Singapore (SIN) - $257 roundtrip

https://www.google.com/travel/flight...bCt8d55yoK9mS8


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