Can you fly with cigarettes and a lighter?

Yes, you can generally bring cigarettes and a lighter with you on a flight, but there are restrictions on how you can carry them.
Cigarettes are allowed in both checked and carry-on luggage, but they must be in their original unopened packaging. It is also recommended that you keep them in your carry-on luggage, as the cargo hold can get very cold and cause the cigarettes to dry out or even freeze.
As for lighters, you are allowed to bring one lighter on board in your carry-on luggage. However, torch lighters and lighters that look like guns are not allowed on planes. It is important to note that different airlines and countries may have different rules and restrictions on what you can bring on board, so it's always best to check with your airline and airport before you travel.