Qatar is well accessed by air. Another mode is by road through Saudi Arabia.
When going by plane to Qatar, you will enter the country at the Hamad International Airport in Doha, the capital of the country.
You can travel to Qatar by bus through Saudi Arabia. There are fixed bus routes, within Qatar. However, customs can take up to 4 hours especially during off-hours.
Qatar does not have a railway network.
The only land route to Qatar is through Saudi Arabia. Wear your seat belt at all times, since there can be security stops and checks along the way.
There are no passenger waterways to or from Qatar.