Ask the Captain: Why flights carry extra fuel

What happens if a plane runs out of fuel during take-off or cruising at high altitude? – From the Skies to the Bar

Adventures of Cap'n AuxThis is Your Captain Speaking — Adventures of Cap'n Aux

Where and How Do Airplanes Store Their Fuel? - Sheffield School of Aeronautics

The fuel dilemma: How pilots know how much to carry - The Points Guy

If someone bought a commercial airplane for private use (for instance a B777), can extra fuel tanks be added for extra range (Let's say for example in the cargo or between walls)?

Exclusive: Safety warning as budget airlines such as Ryanair cut fuel levels for flights, The Independent

How high do planes fly? Scandinavian Traveler by SAS

Flight planning - Wikipedia

Ask a Pilot with Spencer: Why Do Pilots Have to Reset the System?

I'm Sorry The Flight Has A Weight Restriction, You've Been Bumped

How do airplanes carry fuel? How much fuel can they carry in a full tank? - Quora

Honeywell Flight Efficiency

Fuel Planning of a Flight - Fuel Planning of a Flight

Single-Pilot Operations Are Under Increased Scrutiny

Ask the Captain: All your air-travel questions, answered