Sustainable Travel Guide

Learn how to be more sustainable and reduce your travel-related carbon footprint. Based on the 2019 Greenhouse Gas Emissions Inventory, air travel accounted for 13% of UC Berkeley's total greenhouse gas emissions.

To support the university's Carbon Neutrality goals, we encourage all staff, faculty, and students to adopt sustainable travel practices. Please use this sustainable travel guide before booking and during your next trip.

Evaluate Your Trip

Assess your meeting to determine if travel is necessary. Many meetings can now be effectively conducted virtually. UC Berkeley utilizes some Video Conferencing solutions (for example, Zoom and Google Meet), which are available to all staff, faculty, and students.

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Air Travel

Use Direct Bill and ConnexUC

Utilizing Direct Bill and ConnexUC to bill your airfare to UC Berkeley directly will save you time and money. The UC Travel Center (UCTC) and BCD Travel's Concur portals enable travelers to search and sort flight choices by emissions.


Step 1. Once you input your flight search parameters, select 'Emissions' from the 'Sorted By' drop-down menu

Screenshot of the Concur Travel page and Sorted By menu with Emissions selected

Step 2. Click 'View Fares' to expand any flight selection

Screenshot of the Concur Travel page and View Fares button

Step 3. Click on 'Flight Details' to expand any selection

Screenshot of the Concur Travel page and Flight Details button

Step 4. Note the pounds of CO2 emissions in the flight information sections

Screenshot of the Concur Travel page and Flight Details section

Book Direct Flights

Choosing to fly non-stop eliminates half of a single flight’s emissions as you are avoiding extra landings, takeoffs, and taxi times.

Use a UC Travel Partner

Utilize a UC Travel partner (UCTC or BCD) for complex or multi-leg trips. Full-service agents are experts at identifying routes and airports that will work best for your trip, cutting down on extra travel time and expense.

Fly Coach or Economy class

A World Bank study noted that the emissions associated with flying business class were about 3 times as great as flying coach. In business class and first-class, seats are larger, so fewer people are being moved by the same amount of fuel. In addition, the study estimated that a first-class seat could have a carbon footprint 9 times as great as an economy seat.

Use an Electronic Ticket

If possible, do not print your airline tickets, and use an e-ticket. With many passengers flying out of San Francisco International Airport and Oakland International Airport every day, that equates to thousands of single-use pieces of paper being discarded. Please utilize digital e-tickets on your Smartphone or digital device where applicable.

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Car Travel

Carpool with Your Colleagues

When traveling with others, carpool to reduce the amount of fuel and carbon emissions.

Choose an Appropriate-Sized Vehicle

If you are not traveling with colleagues, consider a smaller vehicle.

Rent an Electric or Fuel-Efficient Car

When booking through ConnexUC, you can get access to all-electric or hybrid vehicles at participating locations that will meet UC Travel policy guidelines for reimbursement. Hertz has Teslas available at SFO, LAX, SJC, OAK, ATL, FLL, MIA, JFK, LGA, ORD and many other major airports. Hertz, as well as Dollar and Thrifty, also have hybrids available at select airports. Please keep in mind that supplies are limited, so the further in advance you book your reservation, the better chance you have of finding an ell-electric or hybrid vehicle available. Rental vehicles are only reimbursable when booking through the UC contract in ConnexUC.



Please use the following instructions to check if the location you are traveling to has an electric or hybrid vehicle available:

  • Log in to ConnexUC
  • Go to the Trip Search page
  • Click the Car Search button
  • Enter your travel dates and locations
  • Click the Search button
  • If booking an electric vehicle, select Hertz in the Results column upon the completion of your search
    • A list of vehicles that Hertz offers will be displayed
    • Select a vehicle in the 'Intermediate Elite' category and with 'Electric power' in the description
  • If booking a hybrid vehicle, select Hertz, Dollar, or Thrifty in the Results column upon the completion of your search
    • A list of vehicles that the selected rental car company offers will be displayed
    • Select a vehicle in the 'Intermediate Car Hybrid' category
Screenshot of the Concur Car Search window
Screenshot of the Concur Car Search results table
Screenshot of the Concur Car Search results for an electric vehicle
Screenshot of the Concur Car Search results for a hybrid vehicle

Intermediate Car Category

Any vehicle in the Intermediate Car category is within policy. As long as the vehicle is listed as Intermediate elite, it should be within policy and reimbursable, but it is always good to confirm this first with your funding approver and/or the travel department if there is any question. It is ok if the EV is slightly higher in cost daily than a gas powered intermediate class car, as you will be spending significantly less on electric charging when compared to gas expenses.

If the daily rate is significantly higher than other intermediate vehicles, please email us at and we will confirm if it is within policy.

Take a Lyft or an Uber

Employees can expense rides by selecting their preferred payment method for trips, routing business ride receipts directly to their work inbox, and switching between personal and professional rides.

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Public and Alternative Transportation

Take a Train

Taking a train can reduce your CO2 travel emissions by as much as 90% compared to a plane. The ConnexUC portal offers an Amtrak option where you can book business class.

Use Public Transportation and/or a Bike Share

Using public transportation can further cut down on business travel expenses and can reduce your CO2 travel emissions. When available, take advantage of bike-share programs. Check to see if your hotel offers free bike rentals.

Bay Area sustainable transportation options:

  • AC Transit operates a fleet of hydrogen fuel cell buses
  • BART is taking steps to make its fleet of light rail trains more sustainable
  • AMTRAK reduced its greenhouse gas emissions by 20% from 2010 to 2019
  • Caltrain: The Peninsula Corridor Electrification Project is currently converting Caltrain's diesel operations to an electric system

Airport Shuttle Service

Consider an airport shuttle service or public transportation to and from the airport both at home and your destination. Many locations offer great public transportation options and even free services. Consider whether a rental car is needed.

Take a Lyft or an Uber

Walk When it is Convenient

Walking when you are traveling is a great way to see a new place up close, to get a little exercise, and to save on your business travel budget - all while reducing your carbon footprint.

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Book LEED-Certified Hotels

Book hotels that are Green Seal or LEED-certified. Hotels with these designations integrate environmental considerations into their business practices to decrease their carbon footprint.

Please refer to the following links to search for LEED-certified green hotels:

All LEED-certified hotels will display their certification on their website. You can look for the LEED logo. Many of these sustainable hotels can be found in ConnexUC. UC partner brand Marriott has a large selection of LEED-certified hotels to choose from. Some hotels offer free bike rentals.

U.S. Green Building Council LEED logo

Conserve Energy

Turn off all lights and the air conditioning or heater when not in the room. As you would at home, conserve as much energy as you can when you are not occupying your hotel room.

Reuse Towels

Hang your towels after use. Many hotels encourage guests to reuse towels to reduce energy and water use of washing towels after the first or second use.

Avoid Using the Hotel's Laundry Service

Try to avoid using the hotel's laundry service. Many times, they wash guests' clothes separately, even if there are only a few items to clean.

Leave the Do Not Disturb Sign on the Door

Leave the Do Not Disturb sign on the door for the duration of your stay. This cuts down on chemical cleansing agents, electricity used in vacuuming, and the washing of bed linens.

Try Staying at Airbnbs or Similar Accommodations

Staying at an Airbnb (available via ConneUC) instead of a hotel can make it easier for you to recycle and compost. In addition, you can make your meals and conserve water.

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Choose a Sustainable Restaurant when Dining

There are numerous restaurants to choose from that care about sustainability:

Say No to the Plastic Bags and Straws at Restaurants

Plastic bags and straws account for a large percentage of plastic pollution in the environment due to their inability to be recycled. The US alone goes through over 500 million straws a day. That's enough straws to fill 127 school buses!

Eat Locally

By eating at local restaurants and street food places, you can avoid the use of plastic takeaway containers and utensils. Also, look for businesses that use locally-sourced and/or seasonal produce.

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What to Pack to Support Zero Waste

  • A reusable water bottle and/or travel coffee mug
  • A reusable takeout container and cutlery set
  • Reusable straws
  • Reusable cloth napkins
  • Reusable shopping bags

Please feel free to search online for other eco-friendly travel-related product ideas.