COVID-19 case numbers in the U.S. continue climbing to unprecedented levels as Thanksgiving and the winter holidays grow nearer, but you can bet it won't stop plenty of Americans from leaving home to celebrate with friends and family out of state.

If you'll be among them, it's important to research what sort of restrictions and requirements for out-of-state travelers you can expect to encounter, especially as they can vary vastly. In many places, it depends upon where you're coming from, as well as where you're going, as states seek to prevent possible new cases coming in from areas of the country experiencing high infection levels.

Some states will allow you to enter freely if you can present negative results from a recent COVID-19 test, while others mandate 14-day quarantines for interstate arrivals. Ahead, we've compiled details of the entry requirements being enforced in those states that currently have them.

- Interstate travelers entering Alaska have the option to either quarantine for 14 days upon arrival, or must take a molecular-based COVID-19 test within 72 hours of their departure and upload their negative results into the Alaska Travel Portal. Those still awaiting test results must upload proof that they took the test and then quarantine until results arrive.

- Those who haven't pretested can test upon arrival for $250 per test and must quarantine a personal expense while awaiting the results.

- A second test taken between 5 and 14 days after arrival is recommended, but not required.

- Travelers are now required to social distance for five days after arriving in Alaska, including those who've entered with negative test results.

**For a full list of mandates, requirements and information, check out the state'sofficial website.

- Travelers entering Connecticut from any state (other than New York, New Jersey, or Rhode Island) that has a daily positive testing rate higher than 10 per 100,000 residents or with an overall positivity rate that's higher than a 10-percent as measured over a seven-day rolling average must quarantine for 14 days from the time of last contact within the identified state.

- The list of impacted states currently includes all U.S. states and territories, except for New Jersey, New York, Rhode Island, Vermont, Hawaii and the U.S. Virgin Islands.

- Anyone entering from one of the identified states must fill out a Connecticut Travel Health Form upon arrival. Failure to submit the form or to complete quarantine could result in a civil penalty of $500 per violation.

*For a full list of mandates, requirements and information, check out the state's official website.

- Under the pre-travel testing program that launched in October, Hawaii now allows interstate visitors to bypass the standard 14-day quarantine if they provide proof of negative results from a COVID-19 test taken within 72 hours of arrival.

- Results must specifically come from a Nucleic Acid Amplification Test (NAAT) performed by one of the Hawaii Department of Health's trusted testing partner labs.

- Interstate travelers must upload their test results to the state's online Safe Travels form and complete a health questionnaire within 24 hours of departure. They'll then receive a QR code via email to present to airport screeners upon arrival.

- Hawaii's Big Island now also requires all inbound passengers to take another rapid test upon arrival, while Maui and Kauai also offer secondary tests for visitors optionally.

- Interisland 14-day quarantines are in effect through at least November 30 for anyone island-hopping to Kauai, Hawaii Island or Maui County (Maui, Molokai, Lanai). Interisland passengers arriving in Kauai and Maui counties may bypass the quarantine by presenting negative results of their NAAT test performed by an approved lab within 72 hours of departure.

*For a full list of mandates, requirements and information, check out the state's official website.

- Although Illinois does not currently have any statewide restrictions, Chicago is operating under an Emergency Travel Order that applies to both visitors and returning residents arriving from areas experiencing a surge in new COVID-19 cases.

- Under a new system that was effected on November 13, states are categorized as either Red, Orange or Yellow, based upon their epidemiological conditions in relation to Chicago's. Those coming from Yellow states do not need to quarantine or provide pre-arrival test results. Those coming from Orange states must either obtain a negative COVID-19 test result no more than 72 hours prior to arrival in Chicago or quarantine for 14 days, and those from Red states must strictly quarantine for 14 days upon arrival-no testing option available.

- A guide to states' statuses will be updated every other Tuesday, going into effect the following Friday.

*For a full list of mandates, requirements and information, check out Chicago's official website.

Kansas is requiring residents and visitors to quarantine for 14 days if they have:

-Traveled to or from North Dakota on or after October 21.

-Travel to or from South Dakota on or after November 4.

-Traveled to or from the countries of Belgium or Czechia; or from the country of Andorra on or after October 21.

-Attended out-of-state mass gathering or events consisting of 500 or more people where individuals did not wear masks and observe social distancing (at least six feet apart).

-Been on a cruise ship or river cruise on or after March 15.

*For a full list of mandates, requirements and information, check out the state's official website.

- Travelers arriving in Maine can choose to either quarantine for 14 days or present proof of negative COVID-19 test result no more than 72 hours old.

- Residents of New Hampshire and Vermont are exempted from testing and quarantine requirements. Previous exemptions allowed for residents of Connecticut, New York and New Jersey ended on November 4, and the exemption for Massachusetts ends November 16.

- Anyone not residing in Maine, New Hampshire or Vermont must sign a Certificate of Compliance form, indicating they have received a negative COVID-19 test result, or that they have already complete or promise to complete their 14-day quarantine in Maine. This will need to be provided at whatever lodgings they have rented.

*For a full list of mandates, requirements and information, check out the state's official website.

- Anyone entering Massachusetts from high-risk states (defined as 10 or more daily cases per 100,000 people) must complete the Massachusetts Travel Form and complete a 14-day quarantine.

- Alternatively, out-of-state travelers may provide negative results of a COVID-19 PCR test performed within 72 hours of arrival in the state. Anyone who has tested, but is awaiting results, must quarantine until they receive notice of negative results.

- Those from lower-risk states, defined as those with daily case rates of less than 10 per 100,000 people and overall positive test rates below five percent over a seven-day rolling average, are exempted from these requirements. As of November 11, the only listed lower-risk states are Hawaii, Maine, New Hampshire and Vermont.

- Failure to comply with these rules could result in a civil fine of $500 per day.

*For a full list of mandates, requirements and information, check out the state's official website.

- Those entering New Hampshire for an extended period from out of state are directed to quarantine for 14 days upon arrival.

- Those traveling to from surrounding New England states (i.e., Maine, Vermont, Massachusetts, Connecticut and Rhode Island) are exempt from the quarantine rule.

*For a full list of mandates, requirements and information, check out the state's official website.

- As part of a joint inbound travel advisory issued by New Jersey, Connecticut and Rhode Island, anyone entering New Jersey from an impacted state (those with daily positive case rates higher than 10 per 100,000 residents or with a 10-percent or higher positivity rate) must quarantine for 14 days from the time of last contact within the identified state.

- As of the latest November 10 update, the list of impacted states includes 45 U.S. states and jurisdictions.

*For a full list of mandates, requirements and information, check out the state's official website.

- Anyone traveling to New Mexico from states that have been designated high-risk must quarantine for 14 days upon arrival.

- High-risk states are defined as those having a daily positive case rate that's higher than 80 per 100,000 residents, or a positivity rate of five percent or higher.

- Currently, Vermont is the only U.S. state or jurisdiction that New Mexico considers to be low-risk.

*For a full list of mandates, requirements and information, check out the state's official website.

- At the start of November, New York's Governor Andrew Cuomo threw out previous quarantine rules that were based on regional COVID-positivity rates, instead instituting an order that out-of-state travelers take a test within 72 hours of their departure for New York, then quarantine for three days upon arrival. On day four, individuals must test again and, if the results of both tests are negative, travelers may exit quarantine.

- These restrictions apply to anyone who has been outside of New York state for more than 24 hours.

- Travelers from states that are contiguous with New York are exempt.

- Anyone who declines to be tested must quarantine for 14 days.

- Travelers covered under this advisory must also complete a Traveler Health Form. Anyone who leaves the airport after arriving without completing the form are subject to a $10,000 fine. Those entering New York via other means of transport, including cars, buses and trains, must fill out the form online.

Travelers entering Ohio from states reporting positive testing rates of 15 percent or higher based on a seven-day rolling average are advised to quarantine for 14 days upon arrival.

*For a full list of mandates, requirements and information, check out the state's official website.

- Travelers entering Ohio from states reporting positive testing rates of 15 percent or higher based on a seven-day rolling average are advised to quarantine for 14 days upon arrival.

- As of the latest update on November 11, there are currently 12 impacted states.

*For a full list of mandates, requirements and information, check out the state's official website.

- Anyone traveling to Pennsylvania from states seeing substantial COVID-19 surges (listed here) should quarantine for 14 days upon arrival. At last update on November 13, 40 states had met the criteria, including several states that neighbor Pennsylvania.

*For a full list of mandates, requirements and information, check out the state's official website.

- Amid the national COVID-19 surge, Vermont has changed its policy so that now anyone entering Vermont from out of state must complete either a 14-day quarantine, or a seven-day quarantine followed by a negative test.

- Travelers entering Vermont in a personal vehicle may complete the quarantine and testing in their own state in order to move freely upon arrival in Vermont.

- Travelers entering to Vermont who have not completed a pre-arrival quarantine must complete either a 14-day quarantine, or a seven-day quarantine followed by a negative test, while remaining inside a Vermont lodging establishment or private residence.

- All out-of-state travelers utilizing lodging, camping and short-term rental properties must sign a Certificate of Compliance or affirm a compliance statement via a digital check box at the time of reservation and check-in attesting that they meet the quarantine requirements.

*For a full list of mandates, requirements and information, check out the state's official website.

- Those traveling to Rhode Island from states that have a COVID-19 positivity rate higher than five-percent must quarantine for 14 days. Alternatively, travelers may provide negative results from a test taken within 72 hours of arrival to bypass quarantine requirements.

- Out-of-state visitors must complete a certificate of compliance and an out-of-state travel screening form upon arriving in Rhode Island.

*For a full list of mandates, requirements and information, check out the state's official website.

- Anyone traveling to Washington D.C. from a state or jurisdiction with more than 10 daily new cases per 100,000 people must get tested within 72 hours of travel.

- Those visiting for more than three days will need to test again three to five days after their arrival in the district.

- Visitors from Maryland and Virginia are exempt.

- Those entering D.C. to attend a family emergency or a funeral do not need to obtain a negative test prior to arriving, but must restrict their activities to those related to the emergency.

*For a full list of mandates, requirements and information, check out the district's official website.