End-of-year holiday airport travel tips. Here’s what you need to know.

WASHINGTON - The Transportation Security Administration has seen record numbers of travelers this year and the holiday season is expected to be one of the busiest on record at airports across the Washington, D.C. region.

According to the TSA, the most common thing that slows down a traveler at a checkpoint is having a prohibited item in a carry-on bag.

Here are some holiday airport travel tips from the TSA you can use to make sure your end-of-year flight go smooth:

Get to the airport early

Travelers should arrive a minimum of two hours before their scheduled domestic flights and three hours before scheduled international flights. 

If you find yourself waiting in a security checkpoint lane, use that time to your advantage. That’s the ideal time to remove items from your pockets and place them into a carry-on bag. It’s also the time to get out your ID and boarding pass so you’re not fumbling in your wallet for your ID when you step up to the TSA travel document checking podium.

Know before you go

Travelers need to know what can and cannot go in their carry-on bag, from firearms to oversize liquids. Passengers will spend more time in the security checkpoint if their carry-on items trigger an alarm because it results in TSA’s need to resolve the alarm by opening the carry-on bag to determine what triggered the alarm. 

The most common item that travelers bring to the checkpoint that is not permitted through the screening process are liquids, gels and aerosols that are larger than the acceptable limit. Each passenger may carry liquids, gels and aerosols that are 3.4 ounces (100 ml) or smaller through a checkpoint if those items fit into a one quart-sized, resealable bag. This is known as the 3-1-1 bag. Common travel items that must comply with the liquids rule include toothpaste, shampoo, conditioner, sun block, body spray, mouthwash and lotions. Containers of liquids, gels and aerosols that are larger can be transported in checked baggage. This includes snow globes, which are popular at this time of the year. 

TSA officers also are seeing travelers arrive at the checkpoint with bottles of water, juice, energy drinks, coffee and soda. TSA officers will give travelers the choice to exit the security checkpoint to drink their beverages in the terminal or allow the officer to dispose of it. Travelers may bring empty containers such as a water bottle or insulated container through checkpoints and fill them after passing through the checkpoint.

Use TSA’s tools for your resources

Unsure if an item should be packed in a carry-on bag, checked bag, either or neither? Download the free myTSA app, which has a handy "What can I bring?" feature that allows you to type in the item to find out if it can fly. Or ask on Twitter or Facebook Messenger at @AskTSA. Travelers may send a question by texting "Travel" to AskTSA (275-872). 

What if I am traveling with gifts?

This is the time of year that passengers travel with gifts. TSA recommends packing gifts in gift bags or boxes instead of wrapping them because if a gift triggers an alarm, it will need to be opened to resolve the alarm. Wrapped presents that trigger an alarm will need the gift wrap removed, but if the gift is in a bag or a box, it is much easier for TSA to look at the item to resolve the alarm.

What if I am traveling with food?

Individuals often like to travel with food items during the holiday season. Foods may be transported on flights. Solid food items like fruitcake, candy canes and chocolates are solids and may be transported in a carry-on bag. However, liquids and spreadable foods such as egg nog, wine, champagne, maple syrup and preserves are not solid and should be packed in checked bags. Here’s a helpful tip: If you can spill it, spread it, spray it, pump it or pour it and it is larger than 3.4 ounces, it needs to be packed in a checked bag.

Here's the full list from the TSA.