Translation of fuel in Spanish

We drove to the airport to do early check-in but it went so quickly that we had four hours left before our flight departed. We therefore took a cab back into town and visited the local market.
Due to jet lag (for us it was 10p.m.) we could not sleep, so we stayed at the airport until the morning where we had to take a flight around 8a.m. The destination was Siem Reap in Cambodia.
While waiting for the counter to open, my wife developed a stomach ache. The plane took of at around 4 or 5 pm and landed around 2 hours later at the airport of Santiago de Chile. It was already dark.