Daily cleaning, installation of cabin HEPA filters on flights from Raleigh to San Luis Obispo
The United States has restricted the entry of all foreign nationals who have passed through or have been in China, Iran, Most European Countries (Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, Monaco, San Marino, Vatican City), the UK, Ireland, Brazil and South Africa in the past 14 days.
With the exception of certain travelers which includes certain family members of US citizens or permanent residents including; spouses, children (under the age of 21), parents (provided that his/her US citizen or permanent resident child is unmarried and under the age of 21), and siblings (provided that both the sibling and the US citizen or permanent resident are unmarried and under the age of 21);
There is also an exception for travelers with the following visas: A-1, A-2, C-1, C-1/D, C-2, C-3, CR-1, CR-2, D, E-1 (as an employee of TECRO or TECO or the employee's immediate family members), G-1, G-2, G-3, G-4, IR-1, IR-4, IH-4, NATO-1 through NATO-4, or NATO-6 visa;
Members of the US Armed Forces, spouses, and children of members of the US Armed Forces;
Travelers with invitation of the USA government for a purpose related to the containment/mitigation of the Coronavirus (COVID-19);
Travelers with documents issued by the US Department of Homeland Security, US Customs and Border Protection, or US Department of State indicating that the traveler is exempt from the restriction;
B1 crew crewmembers that are engaged in lightering, Outer Continental Shelf (OCS) activity, wind farm activity, private air/sea crew and other similar crewmember activities;
Students with an F-1 or M-1 visa and their F-2 and M-2 dependents, if they arrive from or have been in Ireland, the UK or Schengen Area in the past 14 days.
All travelers, 2 years of age or older (including US citizens and transit passenger) must present a negative COVID-19 viral or antigen test result issued 72 hours prior to departure or have a proof of recovery from the virus within the last 90 days prior to boarding the plane.
Travelers must complete a disclosure and attestation form before departure.
Exemptions or waiver to the testing requirements may be granted by the CDC on an extremely limited basis when emergency travel (like an emergency medical evacuation) must occur to preserve someone’s life, health against a serious danger, or physical safety and testing cannot be completed before travel.
US citizens and permanent residents arriving from the UK must present a medical certificate with a negative COVID-19 PCR or antigen test result issued within 72 hours prior to departure.
Travelers arriving in New York State must complete the Traveler Health Form.
Travelers arriving in Massachusetts must complete the Massachusetts Health Form.
Travelers are advised to get tested 3-5 days after travel and stay home and self-quarantine for 7 days after travel. Even if they test negative, they must still stay home and self-quarantine for the full 7 days. If the test is positive, isolate to protect others from getting infected.
Travelers who did not get tested, are advised to stay home and self-quarantine for 10 days after travel.
All other info
Travelers are subject to COVID-19 measures set by the state/territory of their final destination. For more information go to CDC website.
Please see our Coronavirus (COVID-19) Travel Restrictions page for more information on restrictions worldwide.
There are no direct flights for this route listed on KAYAK, the shortest multi-flight duration is 7h 44m.
In the past 3 days, the cheapest one-way tickets were found on American Airlines ($177) and United Airlines ($246), and the lowest round-trip tickets have been found on American Airlines ($353) and United Airlines ($502).
From Raleigh to San Luis Obispo, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from San Luis Obispo back to Raleigh , the best deals are generally found on Tuesday, with Friday being the most expensive.
When flying out of Raleigh you will be using Raleigh Raleigh-Durham, often referred to as Raleigh Airport. You will be landing at San Luis Obispo County, also known as San Luis Obispo Airport.
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Raleigh to San Luis Obispo.
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Luis Obispo from Raleigh is likely to change within 7 days, so travelers know whether to wait or book now.
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Luis Obispo with an airline and back to Raleigh with another airline.
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Luis Obispo from Raleigh up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
Scores according to KAYAK customer reviews
Cons: "$400 flight and they only offered orange juice and water. Cheap cheap cheap!"
Pros: "Crew was fantastic!"
Pros: "Direct flight"
Cons: "Delays galore"
Pros: "I really appreciated the gate agents and trying their best to seat families / individuals traveling together on an overbooked flight."
Pros: "In seat entertainment. Great crew."
Cons: "An hour and 15 minutes late departing"
Cons: "Flight delayed due to non-working APU, had to wait for another gate due to late arrival. 8:25 scheduled arrival, now at a gate at 9:54."
Pros: "The individual checking folks in at RDU was extremely positive even after the flight had been delayed for hours. The flight crew was very positive as well."
Cons: "The plane had just been cleaned so smelled strange on arrival. It would have been better had we not been delayed for hour after hour, then delayed to get to a gate even once we landed."
Pros: "Good leg room Good coffee"
Cons: "No iPad to rent or on seat tv screen"
Pros: "To short of a flight to review. Staff was friendly."
Pros: "The flight was on time."
Cons: "Nothing everything was good."
Pros: "Smooth experience"
Cons: "Gogoinflight wifi can be erratic"
Pros: "Crew were friendly"
Cons: "Entertainment system down."
Pros: "On time, not bumpy, new chocolate snack, clean, easy boarding -- you did it all!"
Pros: "Flight was on time."
Cons: "Unremarkable customer service. Very 'blah.'"
Pros: "The Alaska crew were great even with a full aircraft and some rowdy kids. Everyone got along"
Cons: "They can’t regulate temperatures in the front half of the plane. Don’t fly Alaska anymore."
Pros: "Crew was great. Gogo flight entertainment was very good. Boarding was quick and easy."
Cons: "I upgraded to row 6 because I thought it would be more comfortable. I have now learned that the seats in row 6 are narrower due to the tray having to be the flip up type housed in the arm rest. This makes the seat narrower and quite tight for sized large people. 5 hours is a long time to sit in an uncomfortable seat. It did not compensate for the slightly longer leg room."
Pros: "Staff go above and beyond to be friendly and they truly do have a serve with a smile attitude."
Pros: "I felt a great pleasure that there was a changing table in one of the bathrooms. This made things so much easier with a child. The staff was friendly for the most part and allowed us to stretch."
Cons: "The stewards dropped empty plastic cups on me three times and never once said sorry. It was kind of odd from a customer service aspect."
Pros: "The flight crew was incredibly sweet and helpful; one of them even gave me their personal TUMS when I said I didn't feel well."
Cons: "The flight boarded 30 minutes early; I arrived to my gate at the time of when my ticket said boarding started, but they were already calling final boarding call for my flight. I completely panicked. The plane was clean but the seats are very close together and there were no complimentary snacks- even though it was a 6 hour flight. On my flight back from Seattle on Delta, we got a complimentary meal AND a complimentary snack. I was expecting my Alaskan flight to be better based on everything I'd heard from friends, but my return Delta flight showed Alaska up; it was a spacier plane with way more food offered."
Pros: "I love the service! Incredible flight attendants. On time take offs, early arrivals, so many entertainment options. Clean flight! Friendly service!"
Pros: "Accommodated my disabled mother through the whole flying process. Thank you"
Pros: "Flight good and luckily for passengers, not full so more space!! Bought hot meal, and was good ."
Pros: "Little bit more leg room in the Premier seats. Not sure if it was worth the extra cost though-$69...little more legroom, kinda early boarding, a teeny, tiny snack box and free alcoholic drinks (drink service wasn’t speedy so you maybe got a chance for 2)."
Cons: "It was a long flight. No fault of the airline, just a long flight. The food is ridiculously overpriced so you should plan ahead for your own meals."
Pros: "Crew was fun and despite 6 hour flight was constantly engaged. The crew had a friendly, good spirited attitude!"
Pros: "Alaska has more legroom in the regular coach seats than any airline I've flown before. The ability to watch movies and tv for free was awesome. I look forward to flying Alaska again."
Pros: "Everyone was so friendly and helpful. There was a half way blind man sitting behind us and they made sure he had everything he needed the whole flight. I wish Alaska flew everywhere because I would never fly anything else."
Pros: "my flight was from fairbanks to seattle and then to orlando. i was very comfortable and the attendants were caring when someone felt ill. not a medical emergency just a woman who felt odd."
Cons: "the on board thing to do with the tablet didnt work. when we landed in seattle i asked the customer service booth for help and they ould not offer any suggestions except to rent thier equipment"
Pros: "Flying from the East Coast to the West Coast can be painful, but the airline provided access to free movies & TV shows. The flight attendant making the announcements was entertaining and engaging. She was a good presenter, even when giving directions. The seats were also comfortable, and we each had a charging port at our seat. It was very convenient and thoughtful."
Cons: "The free coffee flavored biscuit/cookie was not particularly tasty and a little too dry. Maybe they should consider another cookie option or offer an alternative snack."
Pros: "Crew was friendly and helpful."
Cons: "Food had to be purchased."
Pros: "Happy to now have a direct flight from SEA to SBP!!"
Pros: "Nice crew, helpful. Coffee was good. Seats were pretty comfortable"
Cons: "My ears Filled up and hurt on decent. I tried all the tricks but didn't help. Maybe cabin wasn't pressurized enough?? Also wifi should be free!! We pay enough for the flight, that's not nice."
Pros: "Over all our trip was great. We had early boarding, the flight attendants we're very helpful. They checked to see if you needed anything thru the entire trip. The food was good. Both flights were on time."
Cons: "Nothing, everything was great."
Cons: "Diversion to San Jose without shuttles to downtown SFO."
Pros: "The crew was friendly, I don't have a ticketing app but Alaska air send me a mobile ticket anyway."
Cons: "I'm a big guy so the seats were too small"
Pros: "I got there and home safely. Relatively smooth flight both ways. Liked the fact we were on time, or even early."
Cons: "Flying in general."
Pros: "Relaxing environment"
Cons: "Occasional wafts of restroom smell"
Pros: "Free texting! Friendly staff."
Cons: "Flight was very warm"
Pros: "Everyone was incredibly friendly!!"
Cons: "Screaming 2 year old. No one can control that...."
Pros: "Crew was professional and courteous"
Cons: "Very noisy over the wing."
Pros: "It left on time and arrived a little early. Flight crew was friendly. We got a great deal also"
Cons: "Its economy, so the normal things"
Pros: "Pilot was always keeping everyone posted about time and turbulence"
Pros: "Fairly new plane"
Cons: "The two people next to me each had a loose chihuahua. The plane was full and there was no other seat available."
Pros: "Very pleasant staff. Delicious meal & great service. Bags arrived quickly. Altogether a very smooth flight."
Cons: "Felt pretty cramped. Passenger next to me kept bumping my feet."
Pros: "They suspect the tail of the plane scraped the ground on take off. We hit severe turbulence just after take off that cause the plane to lose cabin pressure. We were routed right back to RDU. After a check of systems we were put back on the plane."
Cons: "There was not much of a vote of confidence that getting back in the plane was a good idea but just the best option at the time! They could have communicated better and more professionally."
Pros: "The Captain was skilled, made you feel comfortable. Kept us informed. From take off to landing all were smooth. Prefer Alaska Airline over all others."
Pros: "The planes were really great and boarding was super efficient. Love that you board from the back forward. In flight crew was pleasant. Love the free entertainment option even though I didn't use it. It would be great on a longer flight!"
Cons: "Would be nice to have some breakfast food options for a 5:30am flight; even if it's yogurt and granola."
Pros: "Awesome flight attendants! I really like that you guys announce when we've hit cruising altitude and that the Pilots give us an idea about how the flight is going to go; bumpy, smooth, when/if to expect turbulence. Thank you!"
Pros: "Very friendly crew."
Pros: "Flight crew were nice"
Cons: "More spacing between people"
Cons: "Passenger that sat next to me occupied part of my seat."
Pros: "Most of the crew were great. Responded to requests promptly. Wifi and movies I could watch on my phone."
Cons: "Seating was tight and my set back was broken. Individual screens for movies."
Cons: "complimentary ear plugs for when there are crying children"
Cons: "More leg room"
Cons: "We are stranded in Miami due to another passengers medical needs. That delay caused us to miss our Connecting flight. We are now unable to get to Belize until Friday and the best they will offer is a coupon for like $30 off a crappy hotel. Next time I’ll lsy more for delta’s far superior service"
Cons: "I sat in a middle seat, sandwiched in between a passenger who had an aisle seat on my left and another passenger who had a window seat on my right. It would have been okay, but both were much larger than me and with the seat already a bit narrow, I felt like a sardine on this flight."
Cons: "Stewardess very rude"
Pros: "Helpful staff and located us at the front of the plane. Easy checkin and friendly attendants."
Cons: "The in flight sandwich was so so but overall good, Turkey sandwich and pepper mayonnaise, for airline food. They included kettle chips and a brownie which was a nice touch."
Pros: "Boarding, entertainment"
Cons: "Arm rests were immobile, meaning could not take advantage of empty seat next to me."
Pros: "I like the fact that I made it to London alive. The turbulence was so bad and the pilot never came on and reassured us I was shaking and nervous all the way across the ocean"
Cons: "The boarding issue to me is a big problem you should put the conditions of the ticket up front and center for example boarding last when you are on an international flight with bags that need to be put in the overhead is a big problem having to pay for each seed internationally for each leg of the trip made my ticket just as expensive as if I had bought it from a regular company never again will I use your service rip off rip off. Once you buy the ticket then you send clarification letting the passenger know they have no rights I had no right to anything I was wondering if they were going to tell me I had to clean the plane in order to be transported from New York to Spain. A satisfied customer is a repeat customer you got over on me once but never again"
Pros: "The movie selection was great!"
Pros: "We were delayed, but still arrived almost on time at our destination"
Cons: "Delay due to weather."
Pros: "Both flights were amazing!"
Cons: "Delayed flight all day long from 11:58 AM till 8:00 PM, where they blamed it on traffic at RDU airport, weather in Chicago, and finally a maintenance delay for from 2:00 PM till 8 PM before they canceled!"
Cons: "The flight was two hours late leaving which caused me to miss my flight to Prague. The notifications about the delay and next steps for rescheduling the second flight were delayed and sent to the wrong email address."
Cons: "Delays and more delays"
Pros: "Food was edible, flight left early, arrived early in philadelpia, the customer service helped out it my baggage."
Pros: "Super smooth flight - it’s an average commuter flight - no fancy bells and whistles."
Cons: "The legroom sucked. I’m 6’1”, and my knees were up against the seat in front of me."
Cons: "Comfort is ok."
Cons: "All of abo e, many delays, no usb plug or refuse to show me, charge for luggage, no headphone."
Pros: "New aircraft with good entertainment system. Did not crash."
Cons: "Very tight seat spacing in pitch and width. Screen did not tilt so even with the very minimal backrest recline viewing was not ideal. This was to "punish" me for not buying the various seating upcharges American tag onto the ticket price. It was a low cost ticket on a very convenient transatlantic flight from RDU, "Easyjet" pricing brings "Easyjet" seating. I have flow a lot, 3MM miles on UA alone, and this reminded me why AA did not get much of my business! I will have to revert to the "Continentalised" UA (another sore point!)."
Cons: "Oh Gina, I would have checked my bag if only you had looked up from your phone for a second!"
Cons: "delayed, missed connection, no assistance automatically booked for 24 hrs later connection, no accomodation travelling with infant, had to spend the night (total >12 hrs) at security post, no AA employee available to assist, horrible customer service actually AA does not know if there is such a thing as customer service exist!"
Pros: "Comfy/roomy seats, friendly staff, female pilot!!"
Cons: "It was freezing and blankets were not available. It is typically cold on flights but this felt like sitting in a freezer. That is the o not reason I gave 4 stars and a 3 star for comfort"
Pros: "Being able to board early due to husband's disability."
Cons: "Only being provided a warm cup of water. Paid extra $$ for seating with no other liberties provided."
Pros: "On time"
Cons: "Very cold on board"
Pros: "- Great entertainment system and choices - Timely departure and arrival"
Cons: "- Marginal seat and leg room comfort for a 5'11'', 180lbs passenger"
Pros: "Boarding, staff, service, arrival all great"
Cons: "No issues"
Pros: "Lots of space and very accommodating. The updates via email were helpful"
Pros: "Short flight times, lovely staff , food and wine ok, not so crowded so more space"
Pros: "Everything was great. Comfortable seats & good service."
Cons: "Unfortunately, the flight was delayed because of a "problem with the plane"- we had to wait at the gate for 2.5hrs for the mechanics to work on it."
Pros: "The flight arrived on time with my luggage, and although I booked through BA, for the first time ever, they managaged to get my special meal request correct."
Cons: "I order a vegetarian meal in the hope I will get something edible. This was the worst airline food I have ever had. The plane was old so the economy class seats were larger than normal. There was, however, no in-seat entertainment. On the upside, I'm glad I didn't fly business class. Compared to the standard set by other airlines, the seats appeared to be from the 80's."
Pros: "Slick boarding"
Cons: "No movies on way out."
Pros: "We made it home safely"
Cons: "Service and comfort are very poor."
Cons: "Flight attendants barely made eye contact and certainly didn't make us feel welcome in business class."
Pros: "The aircraft was not well maintained, middle holds were small and could not accommodate a normal hand bag. A side hold had to be taped to close it."
Pros: "Everything was good."
Pros: "On time. Helpful at check-in and friendly staff on board."
Cons: "They left my bag in RDU.."
Pros: "Flight left about 30 min late but still landed in philly pretty much only time."
Cons: "I wish there was a way to request to not sit next to someone carrying on a pet."
Cons: "We could not check in online because we refused to pay for seats that I felt that already purchased or was entitled to one so I bought a ticket. When we got to the airport and checked in they did not put me and my traveling partner together meaning they didn't see them together not to mention. Our flight was delayed and we only have 4 minutes to get from gate a to gate. We got to the gate collected our boarding passes found out we were seated at the very very very back of the plane right next to the restrooms.........NICE"
Cons: "When I booked my flight, I used Kayac like I always have in the past. To begin with, I selected several flights that were listed, only to have it tell me that this flight is no longer offered, which I assume is engineered to get me to select a more expensive flight. Once I finally found a flight that was still available, I selected it and began the process of providing information and selecting seat assignments. On 2 of the 4 legs of the round trip, there were no more seats available except for upgrade seats, which resulted in an extra $100.00+ in charges. Then when I finished the transaction, I noticed an extra $200.00 charge added. End result was that I ended up paying over double what I would normally pay for this same round trip that I have made many many times. I feel, no I know, that some customer relations person will look at this comment and reply with a pre-generated response apologizing and hoping I have a better experience in the future and thank me for using Kayac. Big companies like yours look at one customer as no big deal. I'm a Physician and have the ability to reach out to multitudes. I'm going to make it my mission in life to reach out to as many people as I can through word of mouth, signs in my office, Internet and social media to let them know about the deplorable practices of your company."
Pros: "On time"
Pros: "Overall smooth trip and congenial staff."
Cons: "This is coming from a western audience but there could have been more entertainment options."
Pros: "Loved that we were on time and that the counter personal were polite and patient."
Cons: "I choose my seat to accommodate a physical condition. My seat was changed at the last minute and that made the flight very uncomfortable."
Cons: "Wifi. Cleaning out back pocket of seat"
Pros: "Very nice crew"
Pros: "Not much."
Cons: "My baggage got lost. Don’t lose it."
Pros: "The new premiere plus was pretty nice and roomy with recliner feature and big personal screen. I'll try this again."
Pros: "This plane has more space than larger plane, was more comfortable."
Pros: "All was perfect!"
Cons: "Overall, flawless"
Pros: "I’m thankful for the non-stop route between Raleigh and San Francisco. I think I’m being disrespected by the Econ Plus fee of $92 for what??— 6 more inches of legroom?? There’s no way to make a 6-7 hour flight enjoyable beyond first class, so there you go..."
Cons: "No gluten-free snacks. For some of us, it’s not just a trendy fad but an actual allergy with severe consequences."
Cons: "The breakfast could have been more substantial than just a muffin. But everything else was very good!"
Cons: "Plane was delayed due to weather from other places. More than 100 people were missing their connections. Crew was irritated with so many questions and seemed bothered to give out flight info to worried customers."
Pros: "Delayed for two hours asked three tunes if I would make my other flight and no attempt to help me just was given a I don’t know response!"
Cons: "That the staff wasn’t willing to help make an informed decision!"
Pros: "Quick and smooth"
Cons: "We were asked to be at the airport 8hrs ahead of time, so we arrived 3am. United desk workers arrived at 4am."
Cons: "Poor food for the price"
Pros: "Great coastal views"
Cons: "O issues"
Pros: "I slept most of the way"
Cons: "They were out of the crackers & cheese snack"
Pros: "Advance boarding for veterans"
Cons: "Multiple delays on departure due to traffic."
Pros: "No one died."
Cons: "The boarding was he'll at best."
Pros: "Emergency seat spacing"
Cons: "No drinks"
Pros: "The snacks that was given"
Cons: "There was a delay leaving and while we was in the air."
Pros: "The United agent's help on Saturday morning from Savannah was excellent."
Cons: "It was an hour late."
Cons: "I checked in in advance of arriving at the airport, and the United personnel still made me use the kiosk, and the sit in a line for 40 minutes to drop my bag! Horrific Service!"
Pros: "Friendly service."
Pros: "First class was fine - nothing too special"
Cons: "Had to run from complete opposite ends of the Denver airport to catch my flight. I had 10 minutes once off the plane and in the terminal to reach my gate to SF and I was in a walking boot do to an ankle injury. Once sweaty on board the flight was turned back to the terminal delayed three hours and I missed my flight home that day. I then spent from 11pm to 8am in the terminal"
Cons: "My flight last week they had us board and then de plane do to plane maintenance after I traveled litterly all day it added an extra hour. Then this flight Washington connection to Detroit from raleigh the pilot never showed up and extra hour went by, we got a new pilots but, then leading to faulty paperwork that took another hour and thirty minutes after boarding the plan to get sorted. When we got that sorted they then proceeded to tell us that the flight atendent had to leave and we had to wait another 20 min for another atendent to arrive before finally making our way to Detroit. They said to file a complaint and we would be compensated for our wait. Not sure if this is the right spot but I'm giving it a go. Thank you Keith Www.keithschmidt.com"
Pros: "On time. Service was good"
Cons: "delay too long"
Cons: "Flight was delayed a few times , learned once i got to the airport flight was delayed .. and delayed 2 more times while on the plane .... They didnt know which way the bags were located ...(baggage claim or at the door way of exit of the plane )"
Pros: "I like everything!!everyone was so nice that it makes you feel so welcome and that you're like in home!!!"
Pros: "Ifot like tga ser vive"
Pros: "New aircraft and smooth ride. Good attendants."
Cons: "My fright get canceled twice! So upset"
Pros: "The hospitality of the crew."
Cons: "The amount of snacks that were served."
Pros: "Fast travel and easy boarding"
Cons: "Seating is uncomfortable and no free WiFi"
Pros: "fast boarding & exiting the aircraft."
Cons: "restroom smelled."
Pros: "Excelent services and good customer services"
Pros: "Everything went how it should."
Pros: "No surprises."
Cons: "Small seats"
Pros: "The service and that i could sleep"
Cons: "Gates where too far away in Newark"
Pros: "No drama. Everything on time. Crews were great."
Cons: "Seats cramped but I'm 6'7" so I should have put more effort into getting a bulkhead or emergency exit seat. My fault."
Pros: "On time"
Pros: "Friendlier attendance."
Cons: "Small glasses of water were offered very infrequently. Needed much much more"
Pros: "Got there."
Cons: "Small, cramped seating. Outdoor jetway upon arrival."
Cons: "The area around me was very dirty. Made me a bit uncomfortable"
Airlines flying from Raleigh to San Luis Obispo have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.
Daily cleaning, installation of cabin HEPA filters on flights from Raleigh to San Luis Obispo
Masks required on board, masks provided on flights from Raleigh to San Luis Obispo
Social distancing seating
Middle seats unavailable to book on flights from Raleigh to San Luis Obispo
Testing for antibodies, testing for symptoms for flights from Raleigh to San Luis Obispo
Waiving of change fees. Search flexible flights from Raleigh to San Luis Obispo